A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Resultados 11-15 de 33
Página 38
... give to the latter an elegantly mammillated condition . In some cases , however , the cellular condition of one or both discs is very obscure . The annulus is also composed of cells , which here occur in several layers ; these cells are ...
... give to the latter an elegantly mammillated condition . In some cases , however , the cellular condition of one or both discs is very obscure . The annulus is also composed of cells , which here occur in several layers ; these cells are ...
Página 39
... gives way , torn by the grapple - like extremities of the spines . The external and granular investments now rapidly disappear , and the statoblast presents itself as the elegant little spiny lenticular body ( fig . 6 ) so ...
... gives way , torn by the grapple - like extremities of the spines . The external and granular investments now rapidly disappear , and the statoblast presents itself as the elegant little spiny lenticular body ( fig . 6 ) so ...
Página 41
... give to the colony the appearance of a variously lobed body enveloped by the gelatinoid ectocyst . It is at the point of these constrictions that the self- division takes place , separating the entire colony into two or more smaller ...
... give to the colony the appearance of a variously lobed body enveloped by the gelatinoid ectocyst . It is at the point of these constrictions that the self- division takes place , separating the entire colony into two or more smaller ...
Página 49
... give to this tunic its characteristic contractility . Now , these muscles are exactly represented by equivalent fibres , which are developed in the homologous tunic or endocyst of the Polyzoa , and constitute the " parietal muscles " of ...
... give to this tunic its characteristic contractility . Now , these muscles are exactly represented by equivalent fibres , which are developed in the homologous tunic or endocyst of the Polyzoa , and constitute the " parietal muscles " of ...
Página 51
... give rise to those composite aggregations which are so characteristic of the group . " + In these words we have an excellent and easily comprehensible enunciation of the essential morphological characters of a Polyzoon . In deriving the ...
... give rise to those composite aggregations which are so characteristic of the group . " + In these words we have an excellent and easily comprehensible enunciation of the essential morphological characters of a Polyzoon . In deriving the ...
Otras ediciones - Ver todas
A Monograph of the Fresh-water Polyzoa: Including All the Known ..., Tema 28 George James Allman Vista de fragmentos - 1856 |
A Monograph of the Fresh-Water Polyzoa, Including All the Known Species ... George James Allman Sin vista previa disponible - 2009 |
Términos y frases comunes
adherent Alcyonella Alcyonella fungosa Alcyonella stagnorum alimentary canal Allman anatomy animal annulus Ascidian attached become Beneden Bowerbankia Brachiopoda branches branchial sac Brit Brux campanulata cavity cell cilia cœnocium crescentic Cristatella Cristatella mucedo d'eau douce described Difflugia disc distinct Dumortier ectocyst embryo endocyst epistome exserted external fibres flabellum fluid fresh-water Polyzoa funiculus ganglion genera genus Gervais hæmal Hancock hippocrepian Hist homologous intestine invaginated l'Acad Lamarck layer Leidy Linnæus lophophore Lophopus crystallinus margin Mém membrane memoir Meyen mouth Müller Naisa naturalists observed œsophagus organ orifice Original figures ovary ovum Paludicella parieto-vaginal muscles peculiar Pedicellina perigastric space Plumatella repens Polype à Panache polypide Polyzoon portion posterior present Raspail respiratory retraction retractor retractor muscles Rösel seen septa side species specimens statoblasts stomach structure surface tentacles tentacula tentacular crown tentacular sheath thoracic chamber transparent transverse Trembley tubes Tubularia repens tunic Tunicata Urnatella walls Zooph Zoophytes