A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Resultados 1-5 de 8
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 34
... ovum is soon afterwards admitted to the lophophore of the young polypides . The parieto - vaginal bands would seem to be drawn out by a process of separation from the walls similar to that just described . The embryo is still contained ...
... ovum is soon afterwards admitted to the lophophore of the young polypides . The parieto - vaginal bands would seem to be drawn out by a process of separation from the walls similar to that just described . The embryo is still contained ...
Página 41
... ovum , a ciliated sac - like embryo , resembling in form and habit an infusorial animalcule : it is a non - sexual zooid . From this is produced subsequently , by a process of gemmation , another form of zooid , namely , the polypide ...
... ovum , a ciliated sac - like embryo , resembling in form and habit an infusorial animalcule : it is a non - sexual zooid . From this is produced subsequently , by a process of gemmation , another form of zooid , namely , the polypide ...
Página 71
... ovum is attributed to them , while some confusion has arisen with regard to the statoblast of Lophopus crystallinus , the body described as such being mani- festly the statoblast of Cristatella . A statement formerly made by M ...
... ovum is attributed to them , while some confusion has arisen with regard to the statoblast of Lophopus crystallinus , the body described as such being mani- festly the statoblast of Cristatella . A statement formerly made by M ...
Página 82
... Ovum ( statoblast ) lenticular , brown , enclosed at the margin by a brownish - white annular cellular sheath , of an inch deep upon one side , 1ʊʊ of an inch on the other , fur- nished at its outer edge inch long , terminating in a ...
... Ovum ( statoblast ) lenticular , brown , enclosed at the margin by a brownish - white annular cellular sheath , of an inch deep upon one side , 1ʊʊ of an inch on the other , fur- nished at its outer edge inch long , terminating in a ...
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 crescentic Cristatella Cristatella mucedo d'eau douce described Difflugia disc distinct Dumortier ectocyst Ehrenbergi 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 oesophagus 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