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 37
... Cristatella and Pectinatella , the statoblast is destitute of any further appendage ; in these two genera , however , it is furnished , when mature , with hooked spines , which , at least in Cristatella , spring alternately from the two ...
... Cristatella and Pectinatella , the statoblast is destitute of any further appendage ; in these two genera , however , it is furnished , when mature , with hooked spines , which , at least in Cristatella , spring alternately from the two ...
Página 39
... Cristatella , and several species of Plumatella ( figs . 42 , 43 ) . The sur- face of the little polyzoon thus become free is destitute of cilia , except on the tentacula ; and the motions of the young animal seem to be quite passive ...
... Cristatella , and several species of Plumatella ( figs . 42 , 43 ) . The sur- face of the little polyzoon thus become free is destitute of cilia , except on the tentacula ; and the motions of the young animal seem to be quite passive ...
Página 41
... Cristatella and Lophopus I have frequently witnessed the multiplication of a colony by a process of self - division . In Cristatella this commences by a constriction which takes place generally towards the middle of the colony , and ...
... Cristatella and Lophopus I have frequently witnessed the multiplication of a colony by a process of self - division . In Cristatella this commences by a constriction which takes place generally towards the middle of the colony , and ...
Página 59
... Cristatella . Linnæus's grand invention of a binary nomenclature had now been established , and we accordingly find in the tenth edition of the Systema Naturæ , ' published in 1758 , the fresh- water Polyzoa for the first time ...
... Cristatella . Linnæus's grand invention of a binary nomenclature had now been established , and we accordingly find in the tenth edition of the Systema Naturæ , ' published in 1758 , the fresh- water Polyzoa for the first time ...
Página 62
... Cristatella , though he acknowledge its affinity with the other fresh - water Polyzoa , he was ignorant of its true ... Cristatella , Alcyonella , and Plumatella , a most important step towards the further elucidation of the tribe ...
... Cristatella , though he acknowledge its affinity with the other fresh - water Polyzoa , he was ignorant of its true ... Cristatella , Alcyonella , and Plumatella , a most important step towards the further elucidation of the tribe ...
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