. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 1 & 4. Paramecium aurelia. 2, 3. Kolpoda cucullus. «, $, contractile vesicles ; t, testes ; o, oral opening ; a, anal opening. (After Ehrenberg.) that all the Infusoria thus furnished are suscep- tible both of transverse and longitudinal divi- sion, so that when so divided each quarter retains one of these organs. In Euodon cucul- lnhts three of these vesicles are present, two of which are placed one on each side of the dental cylinder, and the third in the hinder part of the body near a dilatation of the alimentary
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 1 & 4. Paramecium aurelia. 2, 3. Kolpoda cucullus. «, $, contractile vesicles ; t, testes ; o, oral opening ; a, anal opening. (After Ehrenberg.) that all the Infusoria thus furnished are suscep- tible both of transverse and longitudinal divi- sion, so that when so divided each quarter retains one of these organs. In Euodon cucul- lnhts three of these vesicles are present, two of which are placed one on each side of the dental cylinder, and the third in the hinder part of the body near a dilatation of the alimentary canal in the vicinity of the anal opening. This ani- nwlcule likewise divides both longitudinally and transversely. There is another organ regarded by Ehren- berg as playing an important part in the organi- zation of these Infusoria. This is of a roundish Fig. Euplotes Charon, exhibiting its different modes of fissiparous generation. (After Ehrenberg.) form, but less transparent than the contractile sacculus in the neighbourhood of which it is situated, but its presence has only been de- tected in four or five species. With respect to the functions to be ascribed to the parts above described, it is by no means easy to come to any- satisfactory conclusion. Ehrenberg considers that the contractile organs provided with their radiating canals cannot be regarded as hearts because their movements are so slow ; neither can he regard them as respiratory organs, which would require the presence of a vascular appa- ratus more distinctly developed than it appears to be in the Polygastric animalcules ; he is, therefore, disposed to believe them to be con- nected with the generative system, and refers to them the office of fecundating the ova con- tained in the interior of the body by dispersing the seminal fluid. The opaque body above described, the same authority suggests to be the testis, believing it to secrete a seminal fluid. Both these suppo- sitions are based upon a fancied a
Size: 1980px × 1262px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, booksubjectanatomy, booksubjectphysiology, booksubjectzoology
