Strophomena latissima, Bouch. Very common in the sandy band over the Ferques limestone.

Strophomena Gosseletii, R. Rather scarce, Beaulieu shales.

Leptana Dutertrii, Murch. Very common in the highest part of the Ferques limestone.

Leptana Ferquensis, R. Very common, Beaulieu shales.

Leptana Cedula, R. Very common, lowest part of the Beaulieu

shales.

Leptana Fischeri, Vern. Common, Beaulieu shales.

Chonetes armata, Bouch. Very common over the Ferques limestone. Strophalosia productoides, King. Very scarce, Ferques, Beaulieu. Productus subaculeatus, Murch. Common in every bed, Ferques.

CARBONIFEROUS LIMESTONE.

Terebratula hastata, Sow. This species is found in great numbers in a bed from the highest part of the white limestone, Napoleon quarry.

Athyris Roissyi, M'Coy. This species has been found by Mr. Dutertre at Hardinghem in the Black quarry, which is now full of water.

Spirifer laminosus, M'Coy. Occurs sparingly in the white limestone at Hydrequent.

Spirifer glaber, Mart. Very common in the bed with T. hastata. Productus Cora, D'Orb. This species is found in the lower limestone of the La Côte and Malassise quarries; it is more common in the Haut-banc limestone.

Productus semireticulatus, Mart. Common in the bed with Tr. hastata, was also formerly found in the Black quarry.

Productus giganteus, Mart. There occur in a small quarry near Ferques, and in another near Hardinghem, crushed specimens of a large Productus which Mr. Gosselet refers to this species.

BATHONIAN.

Terebratula maxillata, Sow. This species occurs sparingly in the Great Oolite at Hydrequent and in the Cornbrash, Le Wast. Terebratula submaxillata, Dav. This species is confined within the lower beds of the Great Oolite; Hydrequent.

Terebratula globata, Sow. Very common in the lower part of the Great Oolite at Hydrequent, is found also in the Marquise Oolite; the variety Fleischeri, Opp., occurs unfrequently in the Cornbrash at Le Wast.

Terebratula intermedia, Sow. Very common in the Cornbrash; Le Wast, Lenlinghem.

Terebratula coarctata, Park. Very scarce, Cornbrash, Le Wast. Terebratula hemisphærica, Sow. I have found a single specimen in the Cornbrash; Le Wast.

Waldheimia obovata, Sow. Very common; the variety Siddingtonensis in the Great Oolite at Hydrequent; the varieties perobovata, subobovata and Stiltonensis in the Cornbrash at Le Wast.

Waldheimia lagenalis, Schl. Common in the Cornbrash with the variety sublagenalis.

Waldheimia cardium, Lam. Very scarce, Cornbrash; Le Wast, Lenlinghem.

Rhynchonella concinna, Sow. Common in the Hydrequent limestone. Rhynchonella Hopkinsi, M'Coy. Very common in the Great Oolite of Marquise; a single specimen from the Cornbrash at Le Wast. Rhynchonella elegantula, Bouch. Very common in the marly limestone between the Cornbrash and Great Oolite; Le Wast, Marquise.

Rhynchonella Badensis, Opp. Very common in the Cornbrash, Le Wast; a single specimen from Hydrequent, in the lower part of the Great Oolite.

Rhynchonella Morieri, Dav. Very common in the Cornbrash; Le Wast, Marquise.

Rhynchonella varians, Sow. var. We find in the Cornbrash at Rinxent a small form which we refer to this species.

OXFORD CLAY AND LOWER CALC GRIT.

Waldheimia umbonella, Lam. Very common at Belle; a single specimen from the clays at Le Wast.

Rhynchonella socialis, Phill.

Rhynchonella Leedsii, Walk. These three species are found in the ferruginous Oolite (Kelloway Rock), over the Cornbrash at Bele and Alincthun.

Waldheimia impressa, Buch. Occurs in great numbers in the clays at Le Wast; one specimen has been found in the Coral Rag at Carly.

Terebratula insignis, Sow. Scarce in the Calcaire and Houllefort (Elsworth rock); it is more common in the calcareous band over it at Rety, and is very abundant in the Calcaire du Mont des Boucards.

Waldheimia bucculenta, Sow. Very scarce, I have found six specimens in the Calcaire du Mont des Boucards.

Rhynchonella pectunculoides, Et. Very common in the lowest beds of the Calcaire du Mont des Boucards.

Rhynchonella myriacantha, Desl. I have found a single specimen in the clays at Blèquenèque.

Rhynchonella spathica, Lam. Very common in the Ter. impressa beds; Le Wast.

CORALLINE AND SUPRACORALline Beds. Terebratula insignis, Sch. Ends in the Supracoralline Oolite at Hesdin l'Abbé with forms which show a transition between this species and T. subsella.

Terebratula subsella, Leym. Shows itself at first in the Supracoralline Oolite at Hesdin l'Abbé, and goes up in the Kimmeridge beds. Terebratula globata? Sow. The Oolite of Hesdin l'Abbé contains a biplicated Terebratula, which I cannot distinguish from our Great Oolite globata.

Waldheimia humeralis, Röm. I have sometimes quoted this species under the name of T. bucculenta, which I apply now to another species at a lower level; it appears in the Coral Rag proper at

Carly, but is more abundant in the Supracoralline Oolite of Hesdin l'Abbé.

Rhynchonella pectunculoides, Et. This species goes up into the Coral Rag; Carly.

Rhynchonella pinguis, Röm. This species is found in the Coral Rag, Carly, and in the Supracoralline Oolite; Hesdin l'Abbé. Rhynchonella inconstans, Sow. Very scarce, I have found it only in the Grès de Questrecques, the highest Supracoralline bed. Thecidium ornatum, Moore. Mr. Davidson first found this species on a Ter. humeralis from the Carly Coral Rag, and since I have obtained some other specimens, but it is rather scarce.

KIMMERIDGE CLAY.

Lingula ovalis, Sow. This species was discovered by Mr. J. E. H. Peyton, F.G.S., near the base of the shales in the cliffs of Boulogne; it is very common. I have also found in the Portland shales remains of a Lingula which belong probably to the same species.

Terebratula subsella, Leym. Is rather common in the lower part of the Kimmeridge. Cliffs of Moulin Wibert, Chatillon.

Waldheimia humeralis, Röm. I refer with doubt to this species, some small smooth Terebratula found by Mr. Beaugrand in the Lower Kimmeridge beds; Moulin Wibert.

Rhynchonella pinguis, Röm. Very scarce; two or three specimens have been found in the lowest beds in the cliff of Moulin Wibert.

PORTLANDIAN.

Discina latissima, Sow. I have found good specimens of this species in the shales that overlie the grits with A. gigas in the cliffs at La Crèche and Le Portel; it is rather common.

Waldheimia Boloniensis, R. S.

Waldheimia humeralis, Röm.

Rhynchonella subvariabilis, Dav. These three very scarce species are found in the Middle Portland beds with Ostrea expansa; Tour Croy, Alpreck.

LOWER GREENSAND.

Waldheimia pseudojurensis, Leym.

Rhynchonella Gibbsiana, Sow. These two very scarce species have been found by Mr. Bouchard in the sands under the Gault with Amm. mammillaris; Locquinghem.

GAULT.

Terebratula prælonga, Sow. Occurs in the phosphatic bed under the Gault; Fiennes, Lottinghem.

Rhynchonella Gibbsiana, Sow. In phosphatic nodules, Fiennes. Rhynchonella lineolata, Phill. I have some internal casts from Fiennes which seem to belong to this species.

CHALK MARL.

Magas Geinitzii, Schl. This species has been found by Mr. Barrois at Licques and at Blanez.

1 See GEOL. MAG., 1873, Vol. X. p. 574, with a woodcut figure.

Terebratella truncata, Sow. We refer to this species some small specimens which occur rarely in the Cement Chalk at Neufchatel, but Mr. Barrois looks upon them as belonging to a new species. Kingena lima, Dav.