700 ANATOMY OF VERTEBRATES. 



small, irregular, transverse rugae at its commencement, but these 

 gradually pass into the longitudinal direction at its termination in 

 the urogenital canal, which is by a corrugated valvular fold. 



In the Ratel {Ratelus mellivorus) the lining substance of the 

 uterine horns is disposed in thick longitudinal and oblique folds. 

 The os tineae is a double circular prominence. The beginning of 

 the vagina is beset with numerous minute obtuse rugae, which 

 become larger and more longitudinal as they approach the uro- 

 genital canal: into this the vagina opens by a bilobed valvular fold. 

 The inner surface of the urogenital passage is smooth. 



In the Bitch the capacious capsules of the ovaria have a small 

 aperture at the part nearest the uterus. The fimbriated begin- 

 ning of the oviduct is attached to the exterior boundary of this 

 aperture opposite the ovarium ; the tube itself passes in a wavy 

 course round the anterior part of the capsule to the uterus. The 

 cornua are long, slender, compressed tubes, with numerous flat 

 eminences on the inner surface : they are joined together exter- 

 nally for nearly two inches before they communicate with the 

 body of the uterus. The interior of this part presents a few 

 smooth, longitudinal elevations of the lining membrane. The os 

 tineae is a smooth, thick, simple prominence. The true vagina is 

 of considerable length, with longitudinal rugae: the urethra opens 

 between a small transverse fold and the triangular flattened 

 clitoris, beyond which is a second transverse crescentic fold with 

 its concavity opposite that of the preceding. 



In the Civet ( Viverra Civetta) the ovaria approach nearer 

 to the globular form than usual. They are situated in shallow 

 capsules, on one side of which the oviduct commences by a large 

 elongated aperture. The cornua uteri are long, slender, com- 

 pressed, straight* canals. The corpus uteri is equally simple, but 

 very short ; the vagina is long, with a longitudinally rugous 

 inner surface. The urogenital canal opens externally on a pro- 

 minent vulva, above which there is a semilunar cutaneous de- 

 pression, which receives the ducts of two large scent-glands. 



In the Leopard (Felis Leopardus) the ovaria present an elon- 

 gated, elliptical, flattened form, and are attached by one edge to the 

 ovarian ligament : the peritoneal pouch is large and wide, with 

 an opening extending its whole length. In the Hyaena the 

 ovaria have a more compact oval form, and are more completely 

 inclosed in the peritoneal capsules. The fimbriated aperture of 

 the oviduct is extended in the Leopard along one side of the 

 margin of the pouch ; the ovary itself forms the opposite boundary. 

 In the Hyaena the pavilion forms a smaller proportion of the 



