OF THE SUMATRAN RHINOCEROS. 171 



brought alive to Europe. Unfortunately it died on the 5th of April 

 following, the post-mortem examination showing evidence of dropsy, as 

 well as tubercle in the lungs and spleen. The skin and skeleton of this 

 specimen are now in the British Museum. 



Prof. Owen, in his account of the anatomy of Rhinoceros indicus 

 (Trans. Zool. Soc. iv. pp. 31-58), has described and figured the male 

 organs of that species ; and the present account will fill up the corre- 

 sponding blank that has as yet existed as regards these parts in Cerato- 

 rhimis sumatranus. 



As was to be expected, the two genera closely conform with each 

 other in all main points, with some considerable differences in matters of 

 detail. 



As in R. indicus, there was no scrotum ; each testis measured 4| inches 

 long by 2 broad at the widest part. The epididymis was of the same 

 length as the testis. 



The vasa deferentia were 29 1 inches long by J inch broad ; unlike 

 these ducts in the Indian species, they were not dilated terminally. 

 The vesiculsB seminales resembled in shape those described by Owen : 

 they were 7J inches long, and 1 inch across at the broadest part. The 

 right vesicula had two, the left four, narrow ducts, l|-2 inches long, 

 which joined the vasa deferentia just before these entered the urethra. 

 The verumontauum is short and rounded, | inch long and 1 inch broad. 

 The openings of the ejaculatory ducts were very minute ; a larger pore, 

 which was the only representative of a vesicula prostatica, lay close 

 above. 



The prostate was of a roughly triangular shape, 2 inches long by 5 T. Z. S. 1881, 

 inches across, and had the same structure as in R. indicus, the glands 

 opening by numerous pores on each side of the verumontanum in a well- 

 marked sinus prostaticus. 



Cowper's glands were large (3| inches by 2) and oval; their ducts 

 opened by pores 1| inch in front of those of the ejaculatory ducts. 



The urethra measured in all, in the unerected state, about 23| inches, 

 of which \ inch was " prostatic," 3 inches " membranous," and the rest 

 " spongy." 



The glans penis is a long and tapering cylinder, provided at the end 

 with a second, somewhat mushroom- or trumpet-shaped expansion, 

 nearly in the centre of which is the opening of the urethra. It thus 

 conforms closely with the same organ in R. indicus. But, as will be 

 seen from the drawings, it is provided, in addition, with two large 

 oblong-oval lobes, of the same colour and substance as the rest of the 

 glans, which are free for the greater part of their length, and only 

 attached to the rest of the glans at their bases. These lobes lie on 

 the sides of the dorsum of the penis, and are closely approximated at 

 their bases, as represented in fig. 2. In fig. 1 they are spread out 



