A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
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Página 16
... relation to the digestive system is perhaps very remote . It may possibly be more correctly viewed as connected with sensation . Its homological import will be afterwards considered . From the mouth an esophagus ( Pl . II , fig . 24 ; V ...
... relation to the digestive system is perhaps very remote . It may possibly be more correctly viewed as connected with sensation . Its homological import will be afterwards considered . From the mouth an esophagus ( Pl . II , fig . 24 ; V ...
Página 21
... relation , it is necessary to conceive of the polypide as partially retracted ; the invaginated portion of the endocyst must then be viewed as adherent to the external portion externally , and to the tentacula ( and calyx ? ) internally ...
... relation , it is necessary to conceive of the polypide as partially retracted ; the invaginated portion of the endocyst must then be viewed as adherent to the external portion externally , and to the tentacula ( and calyx ? ) internally ...
Página 22
... relations , as it appeared to lose itself beneath the opacity of the surrounding structures . Its situation would suggest the proba- bility of its being an organ of sense . It is possible , however , that it is a portion of a more ...
... relations , as it appeared to lose itself beneath the opacity of the surrounding structures . Its situation would suggest the proba- bility of its being an organ of sense . It is possible , however , that it is a portion of a more ...
Página 31
... Relation . I have succeeded in making out a distinct nervous system in all the genera with the exception of Urnatella and Pectinatella , which I have had no opportunity of examining , and of Paludicella , in which I have not as yet been ...
... Relation . I have succeeded in making out a distinct nervous system in all the genera with the exception of Urnatella and Pectinatella , which I have had no opportunity of examining , and of Paludicella , in which I have not as yet been ...
Página 42
... relation between it and the testis , as will presently be seen . Now , if the formation of the ovary be attended to , it will be seen that this body is developed at a late period from the walls of the original sac - like embryo , which ...
... relation between it and the testis , as will presently be seen . Now , if the formation of the ovary be attended to , it will be seen that this body is developed at a late period from the walls of the original sac - like embryo , which ...
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