In his various memoirs, Prof. Williamson figures and describes many Yorkshire specimens shewing their internal. organization. Messrs. Cash & Hick have also contributed. papers on the structure of some of the Yorkshire Coal Plants. These papers will be treated of more fully in that part of the report dealing with such specimens. Yorkshire has long been famous for the excellent specimens of Stigmaria which have been discovered during quarrying and other operations. One such discovery is described by Dr. H. C. Sorby in a paper "On the Remains of a Fossil Forest in the Coal Measures at Wadsley, near Sheffield," and another account of a similar but better known discovery was that made at the quarries of Messrs. John Murgatroyd & Sons at Clayton near Bradford, in July, 1886, which has been described, along with other discoveries of a similar nature, by Mr. S. A. Adamson, F.G.S., in a paper "On Recent Discoveries of Carboniferous Vegetation in Yorkshire.”† The finest of the Clayton Stigmaria has been figured by Prof. Williamson in his "Monograph on the Morphology and Histology of Stigmaria ficoides."* This specimen is now in Owens College, Manchester. In 1877, the North of England Institute of Mining and Mechanical Engineers published a volume of "Illustrations of Fossil Plants: being an Autotype reproduction of selected drawings, prepared under the supervision of the late Dr. Lindley and Mr. W. Hutton, between the years of 1835 and 1840, and now for the first time published." This work contains only one Yorkshire record :Asterophyllites sp. Pl. iv. Low Moor. Perhaps this is the Asterophyllites roehli Stur. Quart. Journ. Geol. Soc., 1875, p. 458. ↑ See also Brit. Assoc. Report, 1886, p. 628, and Quart. Journ, Geol. Soc., vol. xliv, P. 375: 1888. [NOTE.--In the record of species in this Report, the value of most species depends on characters derived from the form and arrangement of its various parts, whichfrom the present state of our knowledge seem to indicate differences between the various individuals recorded. Future investigations may show that many of the species recorded are only different parts or conditions of the same plant-but for the purposes of recording and comparing the species of one district with those of other areas-definite names must be applied to definite forms]. SYNOPSIS OF SPECIES. CALAMARIÆ. CALAMITES SUCKOW. GROUP I.—CALAMITINA WEISS. Calamitina (Calamites) varians Sternb. MIDDLE COAL MEASURES. Hor. Upper Chevet Rock. Loc.-Quarry, Darfield, near Hor.-Woolley Edge Rock. Loc. Barnsley, common Hor.-Barnsley Thick Coal. Loc.--Woolley Col., Darton, near Barnsley (Hemingway). Hor.- White Rake Bed. Loc.-Low Moor, near Bradford. Calamitina (Calamites) göpperti Ett. Calamites Göpperti Steinkf. v. Radnitz., p. 27, pl. 1, figs. 3—4. Calamitina Göpperti Weiss, Steinkohlen Calamarien I, p. 127, pl. xvii, figs. 1—2. Calamites (Calamitina) varians abbreviatus Weiss, ibid., vol. ii, p. 73, pl. xvi a, figs. 10-II. Calamites (Calamitina) varians inconstans Weiss, ibid., vol. ii, pp. 62 and 69, pl. xvi a, figs. 7, 8; pl. xxv, fig. 2. Calamophyllites Goepperti Zeiller. Flore foss. d. bassin houil. Geol. Trans, Y.N.U., 1988 (pub. 1890). MIDDLE COAL MEASURES. Hor.-Barnsley Thick Coal. Locs.-East Gawber Colliery, near Barnsley (Hemingway). Woolley Colliery, Darton, near Barnsley (Hemingway). LOWER COAL MEASURES. Hor.-Elland Flagstones. Loc.-Northowram, near Halifax. (Halifax L. and P. Society.) REMARKS.-This species (under the name of var. inconstans, which does not differ from Calamites göpperti Ett.) has been treated by Weiss as a variety of Calamites varians, Sternb. Zeiller on the other hand regards it as a distinct species, and this opinion is adopted here. Although Calamites are such common fossils, the group to which this species belongs, viz. :-those with periodic whorls of large disc-like scars, is by no means well-known, so all such specimens should be most carefully preserved. Calamitina verticillata L. and H. sp. Calamites verticillatus L. and H., Fossil Flora, vol. ii, p. 159, pl. cxxxix. MIDDLE COAL MEASURES. Hor.-Houghton Common Rock. Loc.-In the Sandstone REMARKS. I have not met with any specimens that could be referred to this species. The authors of the Fossil Flora say, 'It is different from any species that has yet been met with on account of its distinct whorls of large deep scars. . . . Unfortunately this character is not alone sufficient to distinguish this species from others now known, and I must confess that I have a difficulty in understanding what are the characters by which C. verticillata L. and H. sp. is to be distinguished from certain other forms. Additional specimens of this plant are therefore very desirable, and if possible from the original locality. GROUP II.-EUCALAMITES WEISS. Eucalamites ramosus Artis sp. Calamites ramosus Artis, Antedil. Phyl. pl. ii. B Calamites nodosus L. and H., Fossil Flora, vol. i, pl. xv, (in part). Calamites (Eucalamites) ramosus Weiss, Steinkohlen-Cala marien, part ii, p. 98, pl. ii, fig. 3; v, figs. 1, 2; vi; vii, figs. 1, 2; viii, figs. 1, 2, 4; ix, figs. 1, 2; x, fig. 1; xx, figs. 1, 2. Foliage:--Annularia radiata Brongt., Prodrome, p. 156. MIDDLE COAL MEASURES. Hor.-Houghton Common Rock. Barnsley (Hemingway). Loc.-Brierley, near Hor.-Woolley Edge Rock. Loc.-Dove Cliff, near Barnsley (Hemingway). Hor.- Winter Coal. Loc. Wheatley Wood Colliery, near Barnsley (Hemingway). Hor.-Barnsley Thick Coal. Locs.--East Gawber Colliery, near Barnsley (Hemingway). Woolley Colliery, Darton, near Barnsley (Hemingway). Monckton Main Colliery, near Barnsley (Hemingway). Hor.- ? Loc.-Lea Brook Quarry, near Wentworth (Artis, type). REMARKS.-The right hand branch on Lindley and Hutton's pl. xv, fig. 2 of the same plate, as well as their pl. xvi, do not belong to C. ramosus (=C. modosus L. and H.). These figures which so long have done duty as the foliage. of this Calamite, have been found on more careful examination to be spikes of cones, whose position in regard to the stem on pl. xv, fig. 1 is merely accidental. This supposed foliage of Calamites ramosus is really a spike of cones belonging to the genus Paleostachya. On the other hand the fruit of Calamites ramosus has been described by Weiss (1.c.), who has shown it to belong to the Calamostachystype of cone. The species is frequent in the Yorkshire Coal Field, but many of the specimens examined had no definite locality. Geol. Trans. Y.N.U., 1888 (pub. 1890). Eucalamites cruciatus Sternbg. sp. Calamites cruciatus Sternb., Vers. i, fasc. 4, p. xxvii, pl. xlix, fig. 5. Calamites cruciatus Brongt., Hist. d. végét. foss. p. 128, pl. xix. Calamodendron cruciatum Zeiller, Expl. carte géol. Fr., vol. iv., p. 152, pl. clxxiv, fig. 3. Calamites (Eucalamites) cruciatus ternarius Weiss, Steink. -Calamarien, vol. ii, p. 112, pl. xiii, fig. 3. Calamites (Eucalamites) quaternarius Weiss, ibid., p. 113, pl. xiii, fig. 1. Calamites (Eucalamites) senarius Weiss, ibid., p. 114, pl. xiii, tig. 2. Calamites (Eucalamites) senarius Kidston, Trans. Roy. Soc. Edin., vol. xxxiii, p. 340, fig. 1. Calamites approximatus L. and H. (not Brongt.), Fossil Flora, vol. iii, pl. ccxvi. Calamites alternans Germar & Kaulfuss, Nov. Act. Acad. Nat.-Curios., vol. xv., part ii, p. 221, pl. lxv., fig. 1. Calamites (Eucalamites) multiramis Weiss, Steink.-Calam., vol. ii, p. 114, pl. x, fig. 2; pl. xii. Calamites (Calamodendron) cruciatus Zeiller, Flore foss. d. bassin houil. d. Valen. p. 353, pl. lv. fig. 2. MIDDLE COAL MEASURES. Hor. Upper Chevet Rock. Loc.-Darfield, near Barnsley (Seal). REMARKS.The specimen noted here was found by Mr. S. Seal, F.G.S., and reported by him to the Yorkshire Geological and Polytechnical Society as Calamites mougeotii. It contains ten scars on each verticil. The number of scars on each verticil differs considerably in different. specimens. GROUP III. STYLOCALAMITES WEISS. Stylocalamites suckowii Brongt. sp. Calamites suckowii Brongt., Hist. d. végét. foss. p. 124 (pl. xiv. fig. 6?); pl. xv, figs. 1-6; pl. xvi, figs. 2, 3, 4 (fig. 1?). |