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 7
... fluid con- tained in a membranous sac with two openings , one for the mouth and the other for the vent ; the tentacula alone being external to the sac . Let us still further suppose the alimentary tube , by means of a system of muscles ...
... fluid con- tained in a membranous sac with two openings , one for the mouth and the other for the vent ; the tentacula alone being external to the sac . Let us still further suppose the alimentary tube , by means of a system of muscles ...
Página 8
... fluid , and investing sacs , repeating itself by gemmation , and thus producing one or more precisely similar systems holding a definite position relatively to one another , while all continue organically united , and we shall then have ...
... fluid , and investing sacs , repeating itself by gemmation , and thus producing one or more precisely similar systems holding a definite position relatively to one another , while all continue organically united , and we shall then have ...
Página 11
... fluid with which these chambers are filled . If we examine the endocyst histologically , we shall find that it possesses a very distinct structure . In Lophopus , which is particularly well adapted for observing the intimate structure ...
... fluid with which these chambers are filled . If we examine the endocyst histologically , we shall find that it possesses a very distinct structure . In Lophopus , which is particularly well adapted for observing the intimate structure ...
Página 14
... fluid , probably in the meshes of a sort of areolar tissue . I have not , however , succeeded in making out in it any distinct structure , but its membranous nature becomes at once manifest when the animal has undergone partial ...
... fluid , probably in the meshes of a sort of areolar tissue . I have not , however , succeeded in making out in it any distinct structure , but its membranous nature becomes at once manifest when the animal has undergone partial ...
Página 15
... fluids , or after month - long maceration in them ; but it is soluble in concen- trated nitric , hydrochloric , and sulphuric acid . Successive boiling in water , alcohol , ether , acetic acid , and caustic potash , renders it nearly ...
... fluids , or after month - long maceration in them ; but it is soluble in concen- trated nitric , hydrochloric , and sulphuric acid . Successive boiling in water , alcohol , ether , acetic acid , and caustic potash , renders it nearly ...
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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