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X. On the Brain of the Siimatran Bhinoceros (Ceratorliinus sumatrensis). By 

 A. H. Gareod, M.A., F.B.S., Prosector to the Society. 



(Eeceived June 19tli, 1877.) 



[Plate LXX.] 



JN a communication to this Society, published in its 'Proceedings' in 1873 (p. 92), 

 I had the opportunity of describing the visceral anatomy of the Sumatran Ehinoceros 

 (Ceratorhinus sumatrensis) from the first specimen received by the Society. A second 

 individual of the species, a female (as was the first), was deposited in the Gardens by 

 Mr. C. Jamrach in July 1875, and was subsequently purchased. It unfortunately died 

 on May 30th of this year, with symptoms of lung disease, a post-mortem examination 

 demonstrating that both lungs were uniformly and throughout implicated. My friend 

 Dr. James F. Goodhart, of Guy's Hospital, late Pathological Registrar at the College 

 of Surgeons, has kindly examined these organs, and reports to me that they " show a 

 very extensive catarrhal pneumonia, degenerating in the centres of most of the patches. 

 There is, in addition, some peribronchial inflammation, evidenced by a large growth of 

 nuclei in the submucous and deeper tissues of the bronchi. The disease therefore 

 precisely corresponds with the caseous pneumonia to which man is subject." 



The specimen is the one referred to by Mr. Sclater in his valuable and superbly 

 illustrated memoir in the Society's ' Transactions,' vol. ix. p. 651 (foot-note ^). 



Feeling how important it is to obtain all possible information with reference to the 

 species, and not having removed the brain in the earlier specimen, T took the oppor- 

 tunity of doing so in the second, and on the present occasion place before the Society 

 the drawings of the brain from difiFerent aspects (Plate LXX.), for verification of which 

 I would refer the reader to the Museum of the College of Surgeons, where the original 

 will be found preserved and mounted. 



The brain of the Indian Ehinoceros {Bhinoceros unicornis) is represented in its 

 diflPerent aspects, and in its internal detail, by Professor Owen, in the 'Transactions' of 

 this Society, volume iv. pis. 19-22, and is described shortly on page 58 et seq. of the 

 same volume. To this it is my desire that the figures here given should form a 

 companion. 



By comparison it will be seen at a glance that the brain of Bhinoceros unicornis is 

 slightly more simple than that of Ceratorhinus sumatrensis, although the greater size 

 of the former species would have favoured an opposite conclusion. 



So complicated and numerous are the convolutions that the general type-plan of their 

 disposition is to a considerable extent disguised. They very closely resemble the same 



VOL. X. — PAKT IX. No. 1. — August 1st, 1878. 3 k 



