PROF. OWEN ON THE ANATOMY OF THE INDIAN RHINOCEROS. 51 



a mushroom on a thick peduncle (fig. 3,^) projecting from an excavation {lb. e, e) at 

 the end of the glans with a thin wall or border, like a second prepuce ; but this is of 

 the same structure as the rest of the firm surface of the glans 



On each side of the base of the glans, and rather towards its under part, there is a 

 longitudinal thick oblong ridge or lobe (PI. IX. figs. 5 & G, and PI. XVII. fig. 1, r, r), 

 three inches and a half in length, and eight lines in basal thickness : the thick rounded 

 free border of each lobe inclines downwards. 



Mucous follicles similar to those on the under surface of the prepuce extend from the 

 attachment of that fold along one half of the interspace of the lateral lobes. The depth 

 of the preputial fold is least on the dorsal side of the glans. On each side of the base 

 of the glans, near the dorsum, the follicles extend along a space of two inches from the 

 root of the prepuce, but do not occur on the middle line. A narrow ridge commences 

 in the median space of the ' dorsum glandis,' which increases in height as it advances 

 forwards, and then subsides two inches from the border of the terminal or apical fossa. 

 The projecting border of this fossa (PI. XVII. figs. 2 & 3, e, e) describes a compressed oval, 

 and is attached to the pedunculated appendage {lb. p, a) by a process, like a frsenum 

 {lb. fig. 3,f,f), continued upon the middle line of both the upper and under surfaces of 

 the thick peduncle {lb. p): the fossa between this peduncle and the free external border 

 is not less than two inches in depth on each side ; the upper or dorsal border of the fold 

 is three times the breadth of the under one. The stem p of the terminal expanded discoid 

 appendage a is subcompressed with an oval section, one inch in long diameter, where it 

 supports the terminal disc two-thirds of an inch across. The disc a is ovate, one inch 

 eight lines long by one inch across its broader inferior part, where it extends farthest 

 from the supporting stem. The urethra {lb. u) is perforated in the middle line of the 

 terminal disc between its middle and upper third. 



The lateral lobes {lb. fig. 1, r,r) consist chiefly of erectile tissue ; and all the parts 

 of this singularly complex glans are much altered in size, and somewhat also in shape, 

 during erection (see PI. IX. figs. -1, 5 & 6). 



Female Organs. — The ovaria are included within a large peritoneal sac (PI. XVII. 

 0, p) communicating with the general abdominal cavity by an opening which is 

 three inches wide. They are compact, oblong, flattened bodies, with a smooth surface, 

 as might be expected from the immature age of the animal. The left ovarium measured 

 three inches and a half in length, by two inches and a half in breadth : the right was 

 somewhat smaller. The external capsule of the ovarium is stout and unyielding, and 

 the serous covering has the appearance of being strengthened by tendinous lines, one 

 of which runs in a curved direction across the anterior part of the ovary, having other 

 shorter lines diverging from it. The stroma ovarii is also dense. Three ovisacs or 

 Graafian vesicles were dissected out of each ovarium : of these one was an inch in 

 diameter, with very dense thick dark-coloured parietes ; the rest had a diameter of 

 two-thirds of an inch, with thinner coats. Their contents were examined with great 



