A manual of zoologyWilliam Blackwood & Sons, 1878 |
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Página 31
... segments remaining attached to one another until a body is produced , which consists of a number of little spheres ... segment , and it is rather a case of " vegetative " repeti- tion of similar parts . Another form of gemmation is ...
... segments remaining attached to one another until a body is produced , which consists of a number of little spheres ... segment , and it is rather a case of " vegetative " repeti- tion of similar parts . Another form of gemmation is ...
Página 35
... segments , each of which becomes detached and swims away . These liberated segments of the little hydra - tuba ( it is about half an inch in height ) now live as entirely inde- pendent beings , which were described by naturalists as ...
... segments , each of which becomes detached and swims away . These liberated segments of the little hydra - tuba ( it is about half an inch in height ) now live as entirely inde- pendent beings , which were described by naturalists as ...
Página 54
... segments , having no definite body - cavity , presenting no traces of a nervous system , and having either no differentiated alimentary apparatus , or but a very rudimentary one . The Protozoa are almost exclusively aquatic in their ...
... segments , having no definite body - cavity , presenting no traces of a nervous system , and having either no differentiated alimentary apparatus , or but a very rudimentary one . The Protozoa are almost exclusively aquatic in their ...
Página 66
... is not perforated by pseudopodial foramina . In these forms ( e.g. , Miliola , fig . 10 , b ) the pseudopodia are emitted solely from the mouth of the last - formed segment of the shell . The vitreous. 66 MANUAL OF ZOOLOGY .
... is not perforated by pseudopodial foramina . In these forms ( e.g. , Miliola , fig . 10 , b ) the pseudopodia are emitted solely from the mouth of the last - formed segment of the shell . The vitreous. 66 MANUAL OF ZOOLOGY .
Página 67
... segment resembling A ( Nodosaria ) ; C , Compound form ( Discorbina ) , in which the buds are thrown out in a spiral , the coils of which lie in one plane . as the type of this division . Another well - known unilocular form is ...
... segment resembling A ( Nodosaria ) ; C , Compound form ( Discorbina ) , in which the buds are thrown out in a spiral , the coils of which lie in one plane . as the type of this division . Another well - known unilocular form is ...
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Outras edições - Ver tudo
Manual of Zoology ...: With a General Introduction on the Principles of Zoology Henry Alleyne Nicholson Pré-visualização indisponível - 2015 |
Palavras e frases frequentes
abdomen adult alimentary canal ambulacral amongst animal Annelides antennæ anus aperture appendages Arachnida articulated attached birds bivalve body bones Brachiopoda branchiæ branchial calcareous carapace cavity cephalothorax chitinous ciliated composed comprising consists contractile Crustacea Ctenophora developed disc distinct division dorsal embryo Eocene external extinct extremity feet females fins fishes Foraminifera fossil furnished gemmation genera genus gills head horny Huxley Hydrozoa incisors Insects integument intestine known labium larva larvæ legs limbs living locomotive males Mammals mandibles margin maxillæ membrane molars Mollusca mouth nervous system operculum organs ovum Owen pairs Paleozoic parasitic placed plates polypide polypites Polyzoa portion possess posterior present regarded reproductive Reptiles resembling respiratory Rotifera rudimentary Scolecida segments shell side Silurian single skeleton sometimes somites species spines stomach structure sub-order surface tail teeth tentacles termed thorax toes transverse tube upper usually valves ventral Vertebrates vesicle whilst wings Zoantharia zooids