108 MR. W. A. FORBES ON THE MALE GENERATIVE 
The prostate was of a roughly triangular shape, 2 inches long by 5 inches across, 
and had the same structure as in R. indicus, the glands opening by numerous pores on 
each side of the veramontanum in a well-marked sinus prostaticus. 
Cowper’s glands were large (35 inches by 2) and oval; their ducts opened by pores 
12 inch in front of those of the ejaculatory ducts. 
“The urethra measured in all, in the unerected state, about 235 inches, of which 4 
inch was “ prostatic,” 3 inches “ membranous,” and the rest “ spongy.” 
The glans penis (Pl. XX. figs. 1, 2) isa 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 | inch transversely. The lobes of the glans 
measured 24 inches long by 13 inch across. 
In R. indicus, according to Prof. Owen (J. ¢. 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, 32 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 
Ceratorhinus. They are about 14 inch in height at the centre, diminishing towards 
each end till they become undistinguishable from the rest of the glans. Ceratorhinus 
therefore differs from restricted Rhinoceros in the greater size and development of the 
lobes, which have 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, 
1 T may mention that Prof. Flower also found for me in the stores of the College of Surgeons a detached glans 
penis of a Rhinoceros exactly like that now described. Its history is somewhat uncertain ; but it was probably 
sent over, along with other viscera of animals, by Sir Stamford Raffles when Governor of Java. There can 
be no doubt that it belongs to a species of Ceratorhinus. 
