OCR Text |
Show 1895.] ANATOMY OF CHAUNA CHAVAEIA. 351 pointed out, similar to that of the Ostrich; but in the Ostrich the zone is not complete above, and the proventriculus is unsymme-trical in shape. The small gizzard of Chauna chavaria exhibited a strongly marked central tendinous area on each of the opposite faces, very dissimilar from the double tendinous area found on each of the similar areas in the Ostrich and Goose. Intestine of Chauna chavaria. s. Proventriculus with g the glandular patch. d. Duodenum enclosing the pancreas (the duodenum has been turned forwards). I to 1. The large loop of the intestine, with y the yolk-sac diverticulum about the middle of its length. This coil has also been raised up and turned forwards. The remains of the ventral mesentery running from the diverticulum are not shown, as they lie under the intestinal loop. c c. The cajca. l.i. Large intestine. r.v. Rectal mesenteric vein. This dips under the mesentery of the large loop, where its course is shown by a dotted line. It there joins with the large central vein of the large loop and with the veins from the duodenum and caeca, and the blood passes forwards, its course being shown by a dotted line, to the portal vein p.v. In the accompanying figure I show the arrangement of the coils |