356 DAVIDSON BLACK 
ansate from the suprasylvian sulcus and also the presence of 
the three discrete sulci mentioned in the preceding paragraph 
which appear to be merged in a single complex in Ocapia and 
Samotherium. 
The curious superficial resemblance of the giraffe brain to 
that of the horse must be considered as the result of analogous 
or convergent evolution. Further consideration of this inter- 
esting condition however is left to a later date, when it is hoped 
to extend these observations by the examination of an extensive 
series of endocranial casts from allied forms, both recent and 
extinct. 
Finally, the present study emphasizes once more the value 
of endocranial configuration as an index to the morphology of 
the brain, the taxonomic importance of which has long been 
recognized (11). 
LITERATURE CITED 
(1) AxsBrecut, P. 1883 Sur la fossette vermienne du crane des Mammifers. 
z Bull. de la Soc. d’Anthrop. de Bruxelles. 
(2) Bepparp, F. E. 1902 Mammalia. The Cambridge Natural History, 
vol. 10, London. 
(3) Buack, Davipson 1915 Notes on the endocranial casts of Okapia, 
Giraffa and Samotherium. Abstract. Anat. Rec., vol. 9, no. 1. 
(4) Boux, Lovurs 1906 Das Cerebellum der Saiugethiere. Jena. 
(5) Brapuey, O. CHarnock 1899 On the convolutions of the cerebrum of 
the horse. Jour. Anat. and Physiol., vol. 33. 
(6) CHAuvEAu, A. 1891 The comparative anatomy of the domesticated 
animals. Second English Edition, translated and edited by George 
Fleming. New York. 
(7) Corr, E. D. 1877 On the brain of Procamelus occidentalis. Proc. 
Amer. Phil. Soc., vol. 17, no. 100. 
(8) ELLENBERGER, W., AND Baum, H. 1900 Handbuch der vergleichenden 
Anatomie der Hausthiere. Neunte Auflage, Berlin. 
(9) Exuior Smirx, G. 1902 Descriptive and illustrated catalogue of the 
physiological series of comparative anatomy contained in the museum 
of the Royal College of Surgeons of England. London, vol. 2, 2nd Ed. 
(10) Exnuror Smits, G. 1902 The primary subdivision of the mammalian 
cerebellum. Jour. Anat. Physiol., vol. 36. 
(11) Extior Smirx, G. 1903 On the morphology of the brain in the Mammalia. 
Trans. Linn, Soc. of London, 2nd Series, vol. 8, Part 10. 
(12) Fuatrau, E., anp Jacopsoun, L. 1899 Handbuch der Anatomie und ver- 
gleichenden Anatomie des Centralnervensystems der Siiugethiere. TI. 
Makroskopischer Teil, Berlin. 
