. A manual of zoology for the use of students : with a general introduction on the principles of zoology . Zoology. Fig. 103.—Morphology of Tunicata. i. Diagramof a Tunicary (after Allman): <7 Ora aperture; b Atrial aperture; c Pharyngeal or branchial sac, with its rows of ciliated apertures ; d Alimentary canal, with its hsemal flexure ; e Anus ; f Atrium; g Ner- vous ganglion. 2, Cynihitt papulosa, a simple Ascidian (after WoodwardJ. stomach an intestine is continued, generally with few flexures, to the anal aperture, which does not communicate directly with the exterior, but opens into t
. A manual of zoology for the use of students : with a general introduction on the principles of zoology . Zoology. Fig. 103.—Morphology of Tunicata. i. Diagramof a Tunicary (after Allman): <7 Ora aperture; b Atrial aperture; c Pharyngeal or branchial sac, with its rows of ciliated apertures ; d Alimentary canal, with its hsemal flexure ; e Anus ; f Atrium; g Ner- vous ganglion. 2, Cynihitt papulosa, a simple Ascidian (after WoodwardJ. stomach an intestine is continued, generally with few flexures, to the anal aperture, which does not communicate directly with the exterior, but opens into the bottom of a second cham- ber, which is called the "cloaca:" (fig. 103, i,/). Superiorly the cloaca communicates with the external medium, by means of the second aperture in the test. The first bend of the intestine is such that, if continued, it would bring the anus on the opposite side of the mouth to that on which the nervous ganglion is situated. The intestine, therefore, is said to have a "haemal flexure;" whereas the flexure in the case of the Polyzoa is " ; The intestine, however, in the Tunicata does not preserve this primary hsemal flexure, but is again bent to the neural side of the body, the nervous ganglion coming. 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 Nicholson, Henry Alleyne, 1844-1899. New York : D. Appleton
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Keywords: ., bookauthorni, bookcentury1800, bookdecade1870, booksubjectzoology
