The Tanganyika problem; an account of the researches undertaken concerning the existence of marine animals in Central Africa . Fig. 12.—Living animals of Chytra kirkii. Jurassic Xenophoridse. On this account I separated kirkiifrom Limnotrochus altogether and placed it in the newgenus Chytra. The investigation of the anatomy of Chytra * Miss L. Digby, Journal of the Linnean Society, 1902. 230 THE TANGANYIKA PROBLEM. kirkii by Miss Digby has fully confirmed the necessityfor such a change, as the following account of her resultswill show. The shell of Chytra kirkii (Fig. 11) is remarkablysolid, c
The Tanganyika problem; an account of the researches undertaken concerning the existence of marine animals in Central Africa . Fig. 12.—Living animals of Chytra kirkii. Jurassic Xenophoridse. On this account I separated kirkiifrom Limnotrochus altogether and placed it in the newgenus Chytra. The investigation of the anatomy of Chytra * Miss L. Digby, Journal of the Linnean Society, 1902. 230 THE TANGANYIKA PROBLEM. kirkii by Miss Digby has fully confirmed the necessityfor such a change, as the following account of her resultswill show. The shell of Chytra kirkii (Fig. 11) is remarkablysolid, closely resembling both that of Solarium andXenophora. The animal is superficially like that of Typhobia, but is. Fig. 13.—The nervous system of Aporrhais pes pelicani exposed from above for com-parison with that of Chytra, p. 232. modified in accordance with the peculiar shape of the shell,in the same manner as the animal of Xenophora. Theteeth on the tongue are highly peculiar and closely resemblethose of Capulus, even in minor details. The tentaclesare long and slender, and the eyes sessile upon theirouter bases. The snout is not long, and like that of THE TANGANYIKA PROBLEM. 231 Aporrhais. In fact, the whole of the visceral anatomyof Chytra closely resembles that of Aporrhais and itsallies. The buccal mass is small and the radular sac a mereexpansion of the alimentary tube. The nervous systemclosely resembles that of both Aporrhais and cerebral ganglia are closely approximated together,and the pleural ganglia are closely applied to them. Thesupra-intestinal cord is long, the left pleural being unitedby a long cord to the left pallial nerve as in Fig. 15. The
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