Material for the Study of Ruminants. 



13 



same horizontal plan, but lie one above the other; the left being closest 

 to the urinary bladder. If this is normal or only an individual varia- 

 tion is difficult to say. But it may be remarked that on the figure of 

 the male genital organs of the Saiga reproduced in Murie's paper 

 quoted above, a similar condition seems to occur and in 'that also, the 

 right tube lies dorsally above the left one. The ductus ejaculatorii open 

 into the urethra not quite 2 cm. from the urinary bladder. A longi- 

 tudinal median plica separates the openings of both ducts and another 

 similar plica is situated on the lateral side of either opening. These 

 three plicae extend 7 mm. in length but join at both ends and corre- 

 spond to a colliculus seminalis and it is continued in a distal direction 

 by a lower plica which at first is double and then simple. This con- 

 dition is rather similar to that found in the common goat. The »vesi- 

 culœ séminales» are almost compact, glandular bodies consisting of a 

 number of follicles. When dissected, free from the surrounding con- 

 nective tissue and straightened, their length will be about 4 1 / / 2 cm., 

 but they are curved and doubled up on themselves so that their length 

 in this state before dissection is not much more than half of that men- 

 tioned above. It is undoubtedly these bodies which have been figured 

 by Murie in his description of the anatomy of the Saiga and termed 

 »prostate gland», but in the text he is dubious whether he shall re- 

 gard them as such or as vesiculœ séminales. The muscles, ischiocaver- 

 nosus, bulb o cavernosus, retractor penis etc. are well developed in the 

 Black-buck. The sigmoid flexure of the penis occurs behind the middle 

 of the organ as in the Saiga. The preputial cavity is long about 10 

 cm. and of an almost uniform appearance with longitudinal folds. The 

 distal portion included in the preputial prominence, about 1 cm. in 

 length, is a little different. It is namely beset with some few, fine 

 hairs scattered over the surface which does not seem glandular any 

 longer as is the case with the portion next to it in a proximal direc- 

 tion. The free end of the penis is short about 4 cm. (Pl. I fig. 2). 

 It is pointed but may nevertheless be referred to the ovine type ac- 

 cording to Garrod's terminology. The end of the penis is not at all 

 swollen, but looks as if twisted from the left to the right side and the 

 end of the urethra is free, and turned up on the left side of the end 

 of the penis in a groove which then continues on the upper side to 

 the end. The urethral prolongation extends still half a centimetre 

 beyond the penis as may be seen on the figure (Pl. I fig. 2). Murie's 



