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 13
... Alcyonella flabellum and A. Benedeni , the earthy particles are entirely absent , from a longitudinal line which commences wide near the aperture of the cell , and gradually narrows as it passes backwards , when it soon assumes the ...
... Alcyonella flabellum and A. Benedeni , the earthy particles are entirely absent , from a longitudinal line which commences wide near the aperture of the cell , and gradually narrows as it passes backwards , when it soon assumes the ...
Página 15
... Alcyonella fungosa , and in Fredericella sultana , imperfect septa may here and there be observed , while Cristatella and Lophopus would seem to be quite deprived of them , the cells in these genera all opening into one another . The ...
... Alcyonella fungosa , and in Fredericella sultana , imperfect septa may here and there be observed , while Cristatella and Lophopus would seem to be quite deprived of them , the cells in these genera all opening into one another . The ...
Página 16
... Alcyonella a gizzard with an organization precisely similar to that of Bowerbankia . * The stomach is a large thick - walled sac , and may be divided into two portions , first a nearly cylindrical prolongation ( Pl . V , fig . 5 ; IX ...
... Alcyonella a gizzard with an organization precisely similar to that of Bowerbankia . * The stomach is a large thick - walled sac , and may be divided into two portions , first a nearly cylindrical prolongation ( Pl . V , fig . 5 ; IX ...
Página 17
... Alcyonella and Plumatella towards the fundus of the stomach ; they become less distinct as we ascend toward the œsophagus , and totally 3 DIGESTIVE SYSTEM . 17 being dilated or contracted, or even completely closed. ...
... Alcyonella and Plumatella towards the fundus of the stomach ; they become less distinct as we ascend toward the œsophagus , and totally 3 DIGESTIVE SYSTEM . 17 being dilated or contracted, or even completely closed. ...
Página 19
... Alcyonella , its neural margin , or that which corresponds to the side of the rectum , is extended into two long triangular lobes or arms , so as to cause the lophophore in these genera to present the form of a deep crescent , round ...
... Alcyonella , its neural margin , or that which corresponds to the side of the rectum , is extended into two long triangular lobes or arms , so as to cause the lophophore in these genera to present the form of a deep crescent , round ...
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