A manual of zoologyWilliam Blackwood & Sons, 1878 |
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Página 61
... membrane or cuticle ; but this is denied by others . Be this as it may , there is no oral aperture , so far as has ever been certainly observed , and the food is merely taken into the interior of the body by a process of intussusception ...
... membrane or cuticle ; but this is denied by others . Be this as it may , there is no oral aperture , so far as has ever been certainly observed , and the food is merely taken into the interior of the body by a process of intussusception ...
Página 79
... membrane " or " ectoderm " ) which covers the exterior of a living sponge . The " sarcoid " has been shown by Mr Carter to be " a granuliferous polymorphic body , possessing a nucleus and one or more contracting vesicles . " In their ...
... membrane " or " ectoderm " ) which covers the exterior of a living sponge . The " sarcoid " has been shown by Mr Carter to be " a granuliferous polymorphic body , possessing a nucleus and one or more contracting vesicles . " In their ...
Página 81
... membrane " of the sponge there exist chambers lined with sponge - particles which are provided with vibratile filaments or cilia ( fig . 20 , cc ) . The pores open b a Fig . 20. - Diagrammatic section of Spongilla ( after Huxley ) .a a ...
... membrane " of the sponge there exist chambers lined with sponge - particles which are provided with vibratile filaments or cilia ( fig . 20 , cc ) . The pores open b a Fig . 20. - Diagrammatic section of Spongilla ( after Huxley ) .a a ...
Página 89
... ( or vesicles ) . The " nucleus " is an oval body ( in some forms band - shaped or rod- like ) , consisting of an outer membrane enclosing granular con- tents , and often having a smaller spherical particle applied. PROTOZOA : INFUSORIA .
... ( or vesicles ) . The " nucleus " is an oval body ( in some forms band - shaped or rod- like ) , consisting of an outer membrane enclosing granular con- tents , and often having a smaller spherical particle applied. PROTOZOA : INFUSORIA .
Página 98
... membranes — an outer layer , called the " ecto- derm , " and an inner layer , or endoderm . " There are no distinct neural and hamal regions , and in the great majority of the members of the sub - kingdom there are no traces of a ...
... membranes — an outer layer , called the " ecto- derm , " and an inner layer , or endoderm . " There are no distinct neural and hamal regions , and in the great majority of the members of the sub - kingdom there are no traces of a ...
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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