29G ORIGINAL ARTICLES, 



which MM. S. Gcoffroy St. Hilaire and Duvernoy have founded a 

 series of elaborate articles upon the Osteology and Anatomy of 

 the Anthropoid Apes, and his labours have been rightly commemo- 

 rated in the specific title of anew Bat — the Epomophorus Franqueti — 

 the largest and finest member of this peculiar group of African 

 frugivorous CMroptera, which has lately been described and figured 

 by Mr. E. ~F. Tomes in the Zoological Society's Proceedings,* and 

 dedicated to its discoverer. 



Ditipwt 3trtti[te* 



XXXI. — On tile Brain oe a Young Chimpanzee. By John 

 Marshall, E.RS. ; Surgeon to the University College Hospital, 

 London. 

 The Chimpanzee, whose brain is described in the ensuing pages, came 

 into my possession within twenty-eight hours of its death ; and the 

 cranium having been opened without delay, and the brain placed 

 immediately in strong spirits, the state of preservation of this organ is 

 very perfect. 



The animal was a young male, in excellent condition, and appa- 

 rently free from disease. From the vertex to the heel, it measured 

 2 feet 4 inches ; from the vertex to the ischial tuberosities, 1 foot 

 6 inches. The fore hand was 5 J inches, and hinder hand 5f inches 

 in length : the fingers were nearly as long as the palm ; the toes were 

 not webbed at their base. The distance from the vertex to the chin 

 was 6 J inches ; from the vertex to the auditory meatus, 2\ inches ; 

 the circumference of the cranium, just above the ears, was 14^ 

 inches ; the length of the ears, which strikingly projected away from 

 the sides of the head, was 2| inches. The temporary teeth were all 

 present, much discoloured, and much worn, but not even the incisors 

 were loose. In the lower jaw, the first permanent molar was well 

 through the gum on the left side, but that tooth was still partially 

 covered on the right : the corresponding teeth of the upper jaw 

 were still beneath the swollen gum ; so that, whatever the fact may 

 be worth, the same lateness of eruption of the upper teeth in com- 

 parison with the lower, as is observed in man, obtained in this 

 animal. The hair was a brilliant black, and the colour of the iris a 

 bright hazel. The total weight of the recent animal was 16 lbs. and 

 8 oz. avoirdupois. 



Weights of the Encephalon and its parts. The entire brain, in- 

 cluding a portion of the medulla and cord, extending JL| inch below 

 the pons, together with the pia mater and cerebral arachnoid, but 



* See P. Z. S. I860, p. 42, pi. lxxv. 



