. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 18 POLYPIFERA. with the kind of fissiparous division which the animalcules undergo. At certain periods four of these saccuii are met with in several of these Infusoria, whilst at others only two are found in animalcules of the same species. When four are present, there are always two situated in each half of the body, and it is remarkable. 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 furnis
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 18 POLYPIFERA. with the kind of fissiparous division which the animalcules undergo. At certain periods four of these saccuii are met with in several of these Infusoria, whilst at others only two are found in animalcules of the same species. When four are present, there are always two situated in each half of the body, and it is remarkable. 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. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Todd, Robert Bentley, 1809-1860. London, Sherwood, Gilbert, and Piper
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