A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Resultados 1-3 de 7
Página 33
... Ovum . - I have succeeded in tracing the development of the ovum through most of its stages in Alcyonella fungosa . In this polyzoon the mature ovum consists of a granular vitellus , surrounded by a very evident vitellary membrane , on ...
... Ovum . - I have succeeded in tracing the development of the ovum through most of its stages in Alcyonella fungosa . In this polyzoon the mature ovum consists of a granular vitellus , surrounded by a very evident vitellary membrane , on ...
Página 82
... Ovum ( statoblast ) lenticular , brown , enclosed at the margin by a brownish - white annular cellular sheath , of an inch deep upon one side , of an inch on the other , fur- nished at its outer edge with 14 to 16 appendages , inch long ...
... Ovum ( statoblast ) lenticular , brown , enclosed at the margin by a brownish - white annular cellular sheath , of an inch deep upon one side , of an inch on the other , fur- nished at its outer edge with 14 to 16 appendages , inch long ...
Página 105
... Ovum ( statoblast ) with its marginal sheath , semi - oval , of an inch long , of an inch broad . Sheath whitish , translucent , smooth , cellular ; with the aperture on its convex side of an inch in diameter ; that upon its flat side ...
... Ovum ( statoblast ) with its marginal sheath , semi - oval , of an inch long , of an inch broad . Sheath whitish , translucent , smooth , cellular ; with the aperture on its convex side of an inch in diameter ; that upon its flat side ...
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 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 longitudinal 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