658 



ANATOMY OF VERTEBRATES. 



in the Armadillo : the tubuli testis are relatively large and 

 disposed in narrow oblique folds beneath the tunica albuginea. 

 The testes lie above the brim of the pelvis : they appear not to 

 pass out of the abdomen, for the vasa deferentia are short and un- 

 convolute : these, converging behind the bladder, penetrate a com- 

 pact triangular prostate (or protometra?) : there are no vesicular 

 glands. The Cowperian glands are situated behind the ure- 

 thral bulb : each has its muscular capsule. Two ( levatores ' arise 

 from the symphysis pubis and send a common tendon to the 

 glans penis. The preputial sheath is of great extent, and the 

 reflected membrane is coloured by a dark pigment. The penis 

 has a disproportionate length, in relation to the mechanical 

 obstacles to coition presented by the body-armour. The testes 

 are constantly abdominal in the Anteaters and Sloths. Hunter 

 notes that the ducts of the vesicular glands of the Anteater open 

 into ' the urethra by a separate sulcus from the common canal.' } 

 There are no vesicular or prostatic glands in the Sloth. ' The 

 penis is a short flat body inclosed in a prepuce which is within 

 the verge of the anus. It is not above two-tenths of an inch in 



length, and terminates in an 

 obtuse point. It has a groove 

 which runs along its under sur- 

 face, and which makes the point 

 somewhat forked.' 2 



374. In Cetacea.- -Here the 

 testes are abdominal, situated at 

 the hinder part of the cavity 

 between the great depressor 

 muscle of the tail and the 

 transversalis abdominis : they 

 greatly augment in size at the 

 rut, but do not change in posi- 

 tion : in their quiescent state 

 they assume an elongate form, 

 fig. 516, a, and the epididymis, 

 by extends unusually far in ad- 

 vance of the gland itself. The 

 vas deferens, c, has a short tract, 

 but is convolute. There are 



516 



Mule organs, Delpliinus. xii. 



HO Vesicular glailds. TllC 



tatic part of the urethra, ib. k, 



k, is surrounded by a thick capsule of muscular fibres. The 

 protometra is reduced to a small, elongate caecum, fig. 517, a, 



1 CCXXXTII. vol. ii. p. 182 - ll>. vol. ii. p. 180. 



