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 35
... Lophopus , Alcyonella , Plumatella , and Fredericella , they occur without any very regular order near the orifice of the cell . In Cristatella the gemmæ are produced very regularly from constant points on the sides of the previously ...
... Lophopus , Alcyonella , Plumatella , and Fredericella , they occur without any very regular order near the orifice of the cell . In Cristatella the gemmæ are produced very regularly from constant points on the sides of the previously ...
Página 37
... Lophopus is seen near the orifice of the cell , as a minute spherical tubercle ( Pl . XI , fig . 10 ) , projecting from the inner surface of the endocyst into the perigastric space . It is evidently composed of a mass of minute cells ...
... Lophopus is seen near the orifice of the cell , as a minute spherical tubercle ( Pl . XI , fig . 10 ) , projecting from the inner surface of the endocyst into the perigastric space . It is evidently composed of a mass of minute cells ...
Página 38
... Lophopus , I have succeeded in following them through various stages of their early development . Their first appearance here is in the form of a little swelling upon the funi- culus , consisting of a mass of minute cells , surrounded ...
... Lophopus , I have succeeded in following them through various stages of their early development . Their first appearance here is in the form of a little swelling upon the funi- culus , consisting of a mass of minute cells , surrounded ...
Página 39
... Lophopus , but the external envelope acquires here over its whole surface minute cilia ( Pl . I , fig . 3 ) , and becomes separated from the rest of the statoblast by a considerable space , which is filled with semi - fluid granular ...
... Lophopus , but the external envelope acquires here over its whole surface minute cilia ( Pl . I , fig . 3 ) , and becomes separated from the rest of the statoblast by a considerable space , which is filled with semi - fluid granular ...
Página 40
... Lophopus crystallinus I have also occasionally seen bodies , which differ from the ordinary statoblasts of these Polyzoa by the possession of a regular elliptical aperture in the centre of their more convex face . They were always empty ...
... Lophopus crystallinus I have also occasionally seen bodies , which differ from the ordinary statoblasts of these Polyzoa by the possession of a regular elliptical aperture in the centre of their more convex face . They were always empty ...
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