[ 183 ] 



IX. On the Anatoiiuj of the Sonrlaic Bliinoceros. By Frakk E. Beddard, M.A., F.R.S.E., 

 F.Z.S., Prosector to the Society, Lecturer on Biolociy nt Guy's Hospital, and 

 Frederick Treves, F.B.C.S., F.Z.S., Hunterian Professor at the Boyal College 

 of Surgeons, Surgeon to the London Hospital. 



Eeccived May 5th, 1885, read June 2nd, 1885. 



[Plates XXXIII.-XXXVIL] 



Introductor}', p. 183. 

 External Characters, p. 183. 

 The Mouth-cavity, p. 186. 

 The Abdomen, p. 186. 

 The Stomach, p. 187. 

 The Spleen, p. 188. 

 The Liver, p. 188. 



The Cceliac Axis, p. 190. 



The Caecum and Colon, p. 191. 



The ilesenteric Arteries, p. 194. 



The Heart, p. 194. 



The Urino-gcnital Organs, p. 195. 



The Brain, p. 197. 



Introductory. 

 The Society's specimen of Bhinoceros sondaicus, which was acquired in 1874 and died 

 in January of this year, has afforded us the material for the present paper. At the 

 time of the animal's death the weather was frosty ; we had therefore hoped to be able 

 to study in detail the muscles and nerves as well as the visceral anatomy. The frost, 

 however, broke, and, as the carcass commenced to decay, we were compelled to abandon 

 this attempt. We have endeavoured to describe as accurately as possible the visceral 

 anatomy, the study of which was facilitated by a successful injection of the arterial 

 system ; in this way we have been able to note the relations of the vascular system to 

 the alimentary canal. The facts recorded in this part of our paper are new, inasmuch 

 as no previous writer on the anatomy of the Rhinoceros has attempted to deal with 

 the subject. 



The only paper known to us which contains any description of the anatomy of 

 Bhinoceros sondaicus is one by Prof. Garrod, published in the ' Proceedings ' of the 

 Society, 1877, p. 707 ; it will be referred to in the course of the following description. 



External Characters. 

 The external characters which distinguish this from the other species of Ehinoceros 

 are so plainly shown in the drawings which accompany Mr. Sclater's paper " On the 

 Rhinoceroses living in the Society's Menagerie " i, that we need not do more than refer to 

 those excellent figures. 



' Trans. Zool. See. ix. p. 645, 



VOL. XII. — PART VI. No. 1. — Apiril, 1887, 2 e 



