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 31
... extremity , sending off at regular intervals a filament to each tentacle upon the outer margin of the arm . When it arrives at the extremity of the arm it turns on itself , and in its retrograde course gives off similar filaments to the ...
... extremity , sending off at regular intervals a filament to each tentacle upon the outer margin of the arm . When it arrives at the extremity of the arm it turns on itself , and in its retrograde course gives off similar filaments to the ...
Página 33
... extremity to the external surface of the stomach , near the commencement of the intestine , and by the other attached to the walls of the cell , and apparently also in connection at this place with the ovary , is a cylindrical flexible ...
... extremity to the external surface of the stomach , near the commencement of the intestine , and by the other attached to the walls of the cell , and apparently also in connection at this place with the ovary , is a cylindrical flexible ...
Página 36
... extremity of the gemma , projects in the form of a roundish mass into the interior of the young cell ( fig . 4 ) . It is the rudimental polypide , and we soon find in it a cavity , which is to become that of the tentacular sheath ...
... extremity of the gemma , projects in the form of a roundish mass into the interior of the young cell ( fig . 4 ) . It is the rudimental polypide , and we soon find in it a cavity , which is to become that of the tentacular sheath ...
Página 37
... extremity of the body . The tentacula now make their appearance as minute tubercles upon the thickened margin of the lophophore ( fig . 15 ) . The tentacula and arms of the lophophore are then simultaneously elongated ( fig . 16 ) ...
... extremity of the body . The tentacula now make their appearance as minute tubercles upon the thickened margin of the lophophore ( fig . 15 ) . The tentacula and arms of the lophophore are then simultaneously elongated ( fig . 16 ) ...
Página 38
... extremities of the funiculus ( Pl . III , fig . 7 ; V , fig . 5 , ≈ ; XI , fig . 36 ) . In Lophopus , I have succeeded in following them through various stages of their early development . Their first appearance here is in the form of ...
... extremities of the funiculus ( Pl . III , fig . 7 ; V , fig . 5 , ≈ ; XI , fig . 36 ) . In Lophopus , I have succeeded in following them through various stages of their early development . Their first appearance here is in the form 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