A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Página 34
... appearance of a trans- parent , closed sac , filled with fluid , the posterior part ciliated , the anterior destitute of cilia and partially or entirely pushed back into the posterior by a process of invagination ; while the sac carries ...
... appearance of a trans- parent , closed sac , filled with fluid , the posterior part ciliated , the anterior destitute of cilia and partially or entirely pushed back into the posterior by a process of invagination ; while the sac carries ...
Página 36
... appearance . The central space between the rudimental tentacula is prolonged downwards , constituting the first trace of a pharynx ; and immediately below this , the mass of the polypide is hollowed out into an internal cavity , which ...
... appearance . The central space between the rudimental tentacula is prolonged downwards , constituting the first trace of a pharynx ; and immediately below this , the mass of the polypide is hollowed out into an internal cavity , which ...
Página 37
... appearance of the bud in 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 ...
... appearance of the bud in 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 ...
Página 38
... appearance here is in the form of a little swelling upon the funi- culus , consisting of a mass of minute cells , surrounded by a denser layer , which is continuous with the surface of the funiculus . The swelling now increases in size ...
... appearance here is in the form of a little swelling upon the funi- culus , consisting of a mass of minute cells , surrounded by a denser layer , which is continuous with the surface of the funiculus . The swelling now increases in size ...
Página 41
... appearance of a variously lobed body enveloped by the gelatinoid ectocyst . It is at the point of these constrictions that the self- division takes place , separating the entire colony into two or more smaller ones . It may , perhaps ...
... appearance of a variously lobed body enveloped by the gelatinoid ectocyst . It is at the point of these constrictions that the self- division takes place , separating the entire colony into two or more smaller ones . It may , perhaps ...
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