A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28Ray Society, 1856 - 119 páginas |
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Página 32
... cell . * During the months of July and August there may frequently be seen in the interior of the cell of Alcyonella fungosa , a roundish mass ( Pl . III , fig . 7 , 4 ) attached by a short peduncle to the endocyst at a little distance ...
... cell . * During the months of July and August there may frequently be seen in the interior of the cell of Alcyonella fungosa , a roundish mass ( Pl . III , fig . 7 , 4 ) attached by a short peduncle to the endocyst at a little distance ...
Página 35
... cell . In Cristatella the gemmæ are produced very regularly from constant points on the sides of the previously existing cells , and the new cells thus produced remaining in apposition with one another , and never becom- ing extended ...
... cell . In Cristatella the gemmæ are produced very regularly from constant points on the sides of the previously existing cells , and the new cells thus produced remaining in apposition with one another , and never becom- ing extended ...
Página 36
... cell . By this time the gemma has become considerably elongated and has acquired a clavate form , and its cavity begins to be cut off from that of the parent - cell by the formation of a septum . We next perceive that a portion of the ...
... cell . By this time the gemma has become considerably elongated and has acquired a clavate form , and its cavity begins to be cut off from that of the parent - cell by the formation of a septum . We next perceive that a portion of the ...
Otras ediciones - Ver todas
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 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