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Show 258 MR. F. E. BEDDARD ON TAPIRUS TERRESTRIS. [May 7, There seems to be no doubt that the cerebral convolutions are simpler in Tapirus than in the other tvpes ; on the other hand, it is well known that the brains of smaller animals are more simple in their convolutions than those of their larger allies. This generalization, however, hardly applies to the Perissodactyla ; Ceratorhinus sumatrensis, as Garrod has pointed out, has a more complex and folded cerebrum than the larger Rh. unicornis; the brain of Rh. sondaicus is if anything rather more complex than that of Rh. unicornis, though here, again, the contrary might have been expected. The brain of the Horse is at least as complicated in the cerebral folds as that of Rhinoceros. It may therefore be that the comparatively simple brain of the Tapir is an indication of a low position among the Perissodactyla, which is of course favoured by other considerations. LIST OF MEMOIRS REFERRED TO. 1. BEDDARD, F. E., and TREVES, F.- On the Anatomy of the Sondaic Rhinoceros. Trans. Zool. Soc. vol. xii. pt. vi. (1887), pp. 183-198, pis. xxxiii.-xxxvii. 2. C H A U V E A U et ARLOING.-Traite d'Anatomie comparee des Animaux domestiques, 2me ed. 3. EUDES-DESLONGCHAMPS.-Remarques Anatomiques sur le Tapir d'Amerique. Mem. Soc. Linn. Normandie, t. viii. (1844). 4. M U R I E , J.-On the Malayan Tapir, Rhinocheerus sumatranus. Journ. Anat. and Phys. vol. vi. (1S72), pp. 131-169, pis. viii.-x. 5. KRUEG.-Ueber die Furchung der Grosshirnrinde der Ungu-laten. Zeitschr. f. wissensch. Zool. Bd. xxxi. (1878), pp. 297-341, Taf. xx.-xxiii. 6. O W E N , Sir R.-Notes on the Anatomy of the American Tapir. P.Z.S. 1830-31, pp. 161-164. 7. G A R R O D , A. H.- On the Brain of the Sumatran Rhinoceros (Ceratorhinus sumatrensis). Trans. Zool. Soc. vol. x. pp. 411-413, pi. lxx. 8. T U R N E R , H. N.-Contributions to the Anatomy of the Tapir. P.Z. S. 1850, pp. 102-106. 9. Y A R R E L L , W.-Observations on the Tapir of America. Zool. Journ. iv. (1829), pp. 210-213. 10. P A R K E R , W . N . - O n some points in the Anatomy of the Indian Tapir (Tapirus indicus). P. Z. S. 1882, pp. 768-777, pis. lviii., lix. 11. M A Y E R , C.-Beitrage zur Anatomie des Elephanten und der iibrigen Pachydermen. Nov. Act. Acad. Leop. Bd. xxii. (1847), pp. 1-88, Taf. i.-ix. 12. D A R E S T E , C.-Troisieme Memoire sur les Convolutions du Cerveau chez les Mammiferes. Ann. Sci. Nat. ser. 4, t. iii. (1855), pp. 65-111, pis. ii., iii. |