108 ME. W. A. rOEBES ON THE MALE GENEEATIVE 



The prostate was of a roughly triangular shape, 2 inches long by 5 inches across, 

 and had the same structure as in E. indicus, the glands opening by numerous pores on 

 each side of the verumontanum in a well-marked sinus prostaticus. 



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

 li 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 (PL XX. figs. 1, 2) 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 artificially, so as to show better their extent and attached bases. 

 The total length of the glans, to the reflection of the prepuce, was 7 inches, the trumpet- 

 like terminal part being 1 inch long, and 1 inch transversely. The lobes of the glans 

 measured 2| inches long by \\ inch across. 



In H. indicus, according to Prof. Owen [l. c. p. 51), " on each side of the base of the 

 glans, and rather towards its under part, there is a longitudinal thick oblong ridge or 

 lobe, 3f inches in length, and 8 lines in basal thickness ; the thick rounded free border 

 of each lobe inclines downwards." Prof. Owen's figure is reproduced in outline, of the 

 original size, in fig. 3, to show the differences thus indicated. By the kindness of 

 Prof. Flower I have been enabled to examine the penis of an Indian Rhinoceros pre- 

 served in the stores of the College of Surgeons, and which is probably the same speci- 

 men as that dissected and described by Prof. Owen, with whose description and figures 

 it closely corresponds. The lobes, however, seem to me to be (as also indicated in his 

 figures) rather on the upper than on the under part of the penis, as they lie, in fact, 

 on each side of the dorsum a little removed from the middle line, as also is the case in 

 CeratorJiinus. They are about 1^ inch in height at the centre, diminishing towards 

 each end till they become undistinguishable from the rest of the glans. Cerator/tinus 

 therefore differs from restricted Rhinoceros in the greater size and development of the 

 lobes, which liave now ceased to be mere elevations or ridges attached throughout their 

 length to the body of the glans, but have become freely projecting lobes attached only 

 by their bases'. In R indicus, too, the terminal part of the glans is more slender, 



' I may mention that Prof. Flower also found for me in the stores of the College of Surgeons a detached glans 

 penis of a llhinoceros exactly like that now described. Its historj" is somewhat uncertain ; but it was probably 

 sent over, along with other viscera of animals, by Sir Stamford Baffles when Governor of Java. There can 

 be no doubt that it belongs to a species of Ceratorhinus. 



