The Tanganyika problem; an account of the researches undertaken concerning the existence of marine animals in Central Africa . s Cerithium. It alsostrongly resembles that of the genus Tanganyicia. Viewedfrom above, Fig. 23, the cerebral ganglia are seen to beclosely fused together, while the left pleural and sub-in-testinal ganglion, as in Cerithuim, form a single massivetrunk, which at its hinder extremity gives rise to the sub- * Loc. cit., Quart. Journ. Micr. Sci., Vol. 41, 1898, p. Ann. Dis. Sci. Nat., 1887, PP- I3I*I35» pl> vli- 16 242 THE TANGANYIKA PROBLEM. intestinal and visce
The Tanganyika problem; an account of the researches undertaken concerning the existence of marine animals in Central Africa . s Cerithium. It alsostrongly resembles that of the genus Tanganyicia. Viewedfrom above, Fig. 23, the cerebral ganglia are seen to beclosely fused together, while the left pleural and sub-in-testinal ganglion, as in Cerithuim, form a single massivetrunk, which at its hinder extremity gives rise to the sub- * Loc. cit., Quart. Journ. Micr. Sci., Vol. 41, 1898, p. Ann. Dis. Sci. Nat., 1887, PP- I3I*I35» pl> vli- 16 242 THE TANGANYIKA PROBLEM. intestinal and visceral nerve cords, and to the right pallialnerve, Fig. 23. From the right pleural ganglion a nervepasses out to the mantle, and a branch from this anas-tomoses with a branch on the pallial nerve just like manner, on the left, the pleural ganglion gives birthto a nerve on that side, Fig. 23, which passes out andprobably anastomoses with a twig given off from thesupra-intestinal ganglion, but I was not able to trace thisnerve throughout its entire course. Unlike the sub-intestinal ganglion, the supra-intestinal.
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