THE ANATOMY OF THE INDIAN ELEPHANT. Gl 



the various ducts seem to be situated nearly as in the human 

 subject. 



Penis. 



Each corpus cavernosum commences by a slightly dilated ex- 

 tremity where it is attached to the ischium, and at once unites 

 with the other crus. An incomplete fibrous septum separates 

 the two along the middle line, while the interior of each is further 

 subdivided by conspicuous but irregular fibrous layers, which 

 are simply enlarged trabeculse. The corpus spongiosum begins 

 by an elongated bulbous enlargement, and gradually diminishes 

 in diameter towards the free end of the penis, so that its figure 

 is compared to that of a carrot. An elongated body measuring 

 three inches by two and a half, situate on the dorsum of the 

 penis two inches behind its extremity, is believed by Dr Watson 

 to represent the glans.^ There is a well-marked prepuce. The 

 orifice of the urethra is Y-shaped, the two limbs being directed 

 upwards, and the stem downwards. 



The levatores 'penis arise, not from the pubes, but from the 

 upper and outer side of each corpus cavernosum, as well as, and 

 principally, from the tuberosity of the ischium. The joint tendon 

 passes in a strong sheath, derived from the tunica albuginea of 

 the corpora cavernosa, to be inserted, according to Camper, into 

 the glans. The other muscles are, on each side of the lower 

 surface of the penis, (1) a hulho-cavernosus, next to the middle 

 line, (2) an iscMo-cavernosus, external to the last, and (3) a com- 

 jpressor of Cowper's gland.'^ The " transverse muscles of the 

 perineum," figured by Camper (pi. v. fig. 1, HK, IL), were not 

 found by Dr Watson. 



The dorsal arteries of the penis lie on each side of the middle 

 line, beneath the levator of the same side. The dorsal veins lie 

 to the inner side of the arteries, and form a plexus, communicat- 

 ing with the corpora cavernosa, on the dorsal surface of the root 

 of the penis. The dorsal nerves run on the outer side of the 

 arteries. 



1 Houel, whose authority is not unimpeachable, figures a kind of glans on the 

 under side of the erect penis. 



^ Dr Watson describes this as lying between the two last muscles. Camper 

 figm-es a "short accelerator "urinse," which may be the same muscle, above the 

 bulb of the urethra (pi. v. fig. 1, FH, Gl). 



