A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
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... genera there are but two , namely , Pectinatella and Urnatella , which I have not yet had an opportunity of examining in a living condition . Both these genera , each consisting of a single species , are confined to the United States of ...
... genera there are but two , namely , Pectinatella and Urnatella , which I have not yet had an opportunity of examining in a living condition . Both these genera , each consisting of a single species , are confined to the United States of ...
Página 11
... genera . The endocyst ( Pl . III , fig . 7 ; V , figs . 5 , 6 ; IX , fig . 7 ; X , fig . 4 , a ) lines the interior of the cells , and when it arrives at their apertures would protrude beyond the ectocyst were it not that it here ...
... genera . The endocyst ( Pl . III , fig . 7 ; V , figs . 5 , 6 ; IX , fig . 7 ; X , fig . 4 , a ) lines the interior of the cells , and when it arrives at their apertures would protrude beyond the ectocyst were it not that it here ...
Página 12
... genera a portion of the endocyst remains in a permanently invaginated state . It is probable that in all these genera the endocyst retains its general structure and contractility for a greater or less extent of its permanently ...
... genera a portion of the endocyst remains in a permanently invaginated state . It is probable that in all these genera the endocyst retains its general structure and contractility for a greater or less extent of its permanently ...
Página 14
... genera the septa are by no means so constant or complete as in Paludicella . In several species of Plumatella , especially P. coralloides ( Pl . VII , figs . 2 , 3 ) , septa exist , but these generally occur only at intervals , leaving ...
... genera the septa are by no means so constant or complete as in Paludicella . In several species of Plumatella , especially P. coralloides ( Pl . VII , figs . 2 , 3 ) , septa exist , but these generally occur only at intervals , leaving ...
Página 15
... genera all opening into one another . The ectocyst of the fresh - water Polyzoa appears in every case to be absolutely structure- less . The fact of cellulose being a constituent of the test of the Tunicata , induced me to look for it ...
... genera all opening into one another . The ectocyst of the fresh - water Polyzoa appears in every case to be absolutely structure- less . The fact of cellulose being a constituent of the test of the Tunicata , induced me to look for it ...
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