A manual of zoologyWilliam Blackwood & Sons, 1878 |
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Página ii
... connection with which the want of a competent text - book in this country has long been a serious evil ; and of the general accuracy and reliability of the information supplied by this convenient little volume we can also speak in terms ...
... connection with which the want of a competent text - book in this country has long been a serious evil ; and of the general accuracy and reliability of the information supplied by this convenient little volume we can also speak in terms ...
Página 30
... connection , or may under- go detachment . It seems to have been established as a strong probability by Darwin , Hildebrandt , and Delpino , that in the great majorty of plants self - fecunda- tion never occurs , but the plant is ...
... connection , or may under- go detachment . It seems to have been established as a strong probability by Darwin , Hildebrandt , and Delpino , that in the great majorty of plants self - fecunda- tion never occurs , but the plant is ...
Página 31
... connected with it . This second mass repeats the process of gemmation as before , and this goes on - all the segments remaining attached to one another until a body is produced , which consists of a number of little spheres of sarcode ...
... connected with it . This second mass repeats the process of gemmation as before , and this goes on - all the segments remaining attached to one another until a body is produced , which consists of a number of little spheres of sarcode ...
Página 34
... connected together , but enjoying an independent existence . None of the zooids , however , are provided with sexual ... connection . In other Hydroid Zoophytes allied to the preceding ( such as Clytia ) , the process advances a step ...
... connected together , but enjoying an independent existence . None of the zooids , however , are provided with sexual ... connection . In other Hydroid Zoophytes allied to the preceding ( such as Clytia ) , the process advances a step ...
Página 67
... connecting bands being called " stolons . " Complex as their structure often is , the compound Foraminifera are , nevertheless , formed by a process of continuous gemmation or budding from a single " primordial segment " in every ...
... connecting bands being called " stolons . " Complex as their structure often is , the compound Foraminifera are , nevertheless , formed by a process of continuous gemmation or budding from a single " primordial segment " in every ...
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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