A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Resultados 6-10 de 39
Página 13
... external investment ( Pl . III , fig . 7 ; V , figs . 5 , 6 ; IX , fig . 7 ; X , fig . 4 , a ) is , in most of the species , composed of a tough pregamentaceous brown membrane , strength- ened by the deposition of irregularly formed ...
... external investment ( Pl . III , fig . 7 ; V , figs . 5 , 6 ; IX , fig . 7 ; X , fig . 4 , a ) is , in most of the species , composed of a tough pregamentaceous brown membrane , strength- ened by the deposition of irregularly formed ...
Página 16
... external surface with vibratile cilia , while those which look towards the vent are thin , membranous , and transparent , and destitute of cilia . It may be observed , when the polypide is exserted from its cell , to be in a constant ...
... external surface with vibratile cilia , while those which look towards the vent are thin , membranous , and transparent , and destitute of cilia . It may be observed , when the polypide is exserted from its cell , to be in a constant ...
Página 17
... externally into a more compact layer ( Pl . III , fig . 7 , λ ) composed of smaller , simple cells ( Pl . II , fig . 8 ) , with colourless contents and a brilliant nucleus . The third or most external layer is a thin membrane ( Pl . III ...
... externally into a more compact layer ( Pl . III , fig . 7 , λ ) composed of smaller , simple cells ( Pl . II , fig . 8 ) , with colourless contents and a brilliant nucleus . The third or most external layer is a thin membrane ( Pl . III ...
Página 18
... external layers of the stomach , the former being here largely developed ( A ' ) , while the internal or hepatic layer of the stomach is entirely absent , and there are no longitudinal ruga . The mouth and upper part of the oesophagus ...
... external layers of the stomach , the former being here largely developed ( A ' ) , while the internal or hepatic layer of the stomach is entirely absent , and there are no longitudinal ruga . The mouth and upper part of the oesophagus ...
Página 20
... external layer consists of rounded cells filled with a colourless fluid , and often presenting a bright nucleus . Some of those cells which lie upon the back of the tentacle become in certain genera enlarged , giving a vesicular ...
... external layer consists of rounded cells filled with a colourless fluid , and often presenting a bright nucleus . Some of those cells which lie upon the back of the tentacle become in certain genera enlarged , giving a vesicular ...
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 crescentic Cristatella Cristatella mucedo d'eau douce described Difflugia disc distinct Dumortier ectocyst Ehrenbergi 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 longitudinal lophophore Lophopus crystallinus margin Mém membrane memoir Meyen mouth Müller Naisa naturalists observed oesophagus 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