A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Página 4
... embryos of Flustræ ; he also gives an account of the animals of Flustra carbasea and F. foliacea , and shows them to be quite different from the hydroid polype of the Sertulariæ ; but he seems as yet to have had but an imperfect ...
... embryos of Flustræ ; he also gives an account of the animals of Flustra carbasea and F. foliacea , and shows them to be quite different from the hydroid polype of the Sertulariæ ; but he seems as yet to have had but an imperfect ...
Página 33
... embryo , while still confined within the coverings of the egg , presenting in some part of its surface an opening which leads into the central cavity ; and through this opening an unciliated , hernia - like sac is capable of being ...
... embryo , while still confined within the coverings of the egg , presenting in some part of its surface an opening which leads into the central cavity ; and through this opening an unciliated , hernia - like sac is capable of being ...
Página 34
... embryo of Alcyonella . The stage represented in 3 has not been actually seen , but seems to be the only one that will supply the missing link . Towards the opening which leads from without into the central cavity the chorization is ...
... embryo of Alcyonella . The stage represented in 3 has not been actually seen , but seems to be the only one that will supply the missing link . Towards the opening which leads from without into the central cavity the chorization is ...
Página 35
... embryos will be liberated in abundance , and may be examined . with facility . Gemmation . The development of gemmæ has already been partially traced in the description just given of the larva of Alcyonella ; we must now follow it ...
... embryos will be liberated in abundance , and may be examined . with facility . Gemmation . The development of gemmæ has already been partially traced in the description just given of the larva of Alcyonella ; we must now follow it ...
Página 41
... 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 , with a " " * An account of ...
... 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 , with a " " * An account of ...
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