. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. MUSEUM OF COMPARATIVE ZOOLOGY. 303 not yet in communication with the stomach, and is still imperforated at the anal end. The mouth (o) opens at the base of the branchial sac, on the lucmal side of the posterior end of the gill («), and is joined by a short curved oesophagus (o') to the stomach (o"); the intestine (ow) is parallel to the long axis of the stomach, and the anus {o"") is close to the mouth, but opens, not into the branchial, but into the atrial chamber, the posterior boundary of which is in
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. MUSEUM OF COMPARATIVE ZOOLOGY. 303 not yet in communication with the stomach, and is still imperforated at the anal end. The mouth (o) opens at the base of the branchial sac, on the lucmal side of the posterior end of the gill («), and is joined by a short curved oesophagus (o') to the stomach (o"); the intestine (ow) is parallel to the long axis of the stomach, and the anus {o"") is close to the mouth, but opens, not into the branchial, but into the atrial chamber, the posterior boundary of which is indicated by the line I. Fig. ~niu Nucleus of adult Cliain-salpa, — male; figured with the neural side uppermost: a, test ; b, outer tunic ; 1, external aperture of testis ; 2, anus ; 3, mouth ; nu, nucleus. The whole digestive tract is immovable, and without muscles, and the food is driven through the permanently distended cavity by means of the cilia, with which its entire inner surface is lined. The great pos- terior sinus surrounds the digestive system on all sides, and the mitriment is absorbed directly from its surface by the blood. In the young a layer of large dark-colored cells may be seen, covering the posterior portion of the stomach and intestine (Fig. 33) ; these. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1871
