690 ANATOMY OF VERTEBRATES. 



which opens into a wide urethra about an inch from the end of 

 the clitoris, the groove of which is continued from the urethra. 

 The usual subordinate relations of urethral and vaginal canals 

 are here reversed. The clitoris in Dasypus 6-cinctus is longer 

 than in the 9-banded species, measuring nine lines in the un- 

 erect state : it is of a pointed form, covered with a leaden-coloured 

 integument, and situated an inch anterior to the anus : the vulva 

 is placed on an eminence. From this orifice the urogenital canal 

 extends eight lines, receiving the vagina by a transverse semilunar 

 slit, and being then continued for five lines further without any 

 diminution of diameter, and terminating in the form of a cul-de- 

 sac, into which the urethra opens by a very small orifice. In 

 Das. Peba, the urogenital cavity is not separated by a corre- 

 sponding contraction from the urinary bladder, but is a more 

 direct continuation of it. In this Armadillo the uterus is un- 

 divided ; it expands to the fundus, which again contracts to a 

 point, the oviducts being continued from the sides of the fundus : 

 in Dasypus 6-cinctus the uterus is triangular, the fundus expand- 

 ing into slightly produced angles, from which the oviducts are 

 continued. These, in both species, wind round the peritoneal 

 capsules of the ovaries, become tortuous, and terminate by fim- 

 briate expanded openings directed toward the ovary, which was 

 subelongate and smooth in both the dissected specimens. 



In the Ai (Bradypus tridactylus) the uterus is like that of 

 Dasypus 6-cinctus, the oviducts being continued from the angles 

 of the fundus : between the uterus and vagina there is as 

 little distinction ; and the elongate common canal communi- 

 cates (in the young Sloth) by two apertures with a short and 

 wide urogenital passage. The ovaria are smooth elliptic bodies, 

 with a greater proportion of stroma than in multiparous Lissen- 

 cephala : the oviducts, commencing by fimbriate apertures upon 

 the anterior edge of the capsule, pursue a serpentine course in 

 that peritoneal fold to the fundus uteri. The ovarian ligaments 

 are continued each along the margin of a peritoneal fold upward 

 to the diaphragm, and downward to an oval ( parovarium,' or 

 remnant — of unusual size — of the 'Wolffian body': the un- 

 obliterated termination of its duct opens, as in most Lissencephala, 

 on each side the urogenital passage, here very short. In the 

 Unau (Bradypus didactylus) the rudiment of an uterine septum 

 appears as a longitudinal ridge from the inner surface of the 

 anterior wall in the unimpregnated state : in this species, also, 

 the utero-vaginal canal communicates in the virgin animal by 

 two distinct orifices with the short urogenital tract, the outlet of 



