The Tanganyika problem; an account of the researches undertaken concerning the existence of marine animals in Central Africa . Fig. 14.—A single row of the lingual teeth of Chytra kirkii (X 150). sub-intestinal cord is shorter and the sub-intestinal ganglionis directly connected with the right pleural ganglion by along zygoneurous connection; the right pallial nerve arisingindependently from the right sub - intestinal from the side, the cerebro-pedal and pleuro-pedalcords are short, like those of Capulus. The oesophagus is nearly straight and leads into thestomach, which is div
The Tanganyika problem; an account of the researches undertaken concerning the existence of marine animals in Central Africa . Fig. 14.—A single row of the lingual teeth of Chytra kirkii (X 150). sub-intestinal cord is shorter and the sub-intestinal ganglionis directly connected with the right pleural ganglion by along zygoneurous connection; the right pallial nerve arisingindependently from the right sub - intestinal from the side, the cerebro-pedal and pleuro-pedalcords are short, like those of Capulus. The oesophagus is nearly straight and leads into thestomach, which is divided into two chambers, the anteriorchamber containing a crystalline style. On the floor of theposterior chamber there is a conspicuous longitudinal 232 THE TANGANYIKA PROBLEM. valvular fold which becomes doubled near the aperture ofa bile duct, and then passes, as in Trochus, into a small, butquite well developed, spiral caecum. Except for the presenceof the anterior chamber, which appears to be absent in thegenus Trochus, Chytra possesses a stomachic apparatus. Fig. 15.—The nervous system of Chytra kirkii dissected from above. (From adrawing by Miss Digby.) strictly comparable to that in the majority of the Rhipido-glossa, including Pleurotomaria itself. The intestine leaves the stomach on the left, and after acharacteristic double twist, enlarges into the rectum. Thisenlarged rectum is filled with complex glandular folds, butnarrows again before it opens at the anus, which has adistinctly modified rim. The heart has the typical Taenioglossate characters, and THE TANGANYIKA PROBLEM. 233 the gill and the gill leaves are identical with those ofAporrhais. The kidney lies around and below the heart, fc?
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectm, booksubjectzoology
