GENITAL ORGANS OF THE BITCH 



523 



inches (ca. 12 to 15 cm.) long. The horns are of uniform diameter, are nearly 

 straight, and he entirely within the abdomen. They diverge from the body in the 

 form of a V toward each kidney. Their posterior })arts are united by the peri- 

 toneum. The neck is very short and is fused dorsally with the vagina. It has a 

 thick muscular coat. The nmcous mem- 

 brane of the uterus has long uterine glands 

 and also short tubular crypts. 



The broad ligaments contain fat and 

 unstri])(Ml nniscle. They arc much longer in 

 the middle than at either end. The posterior 

 part is attached to the anterior part of the 

 vagina. The round ligaments are very long, 

 extending through the inguinal canals, and 

 traceable almost to the vulva. 



The horns of tlic firavicl utorus present dilata- 

 tions or ampullae, which contain the fa-tuses, and 

 are separated Ijy constrictions. The gravid uterus 

 lies on the ventral alxlominal wall, and toward the 

 end of gestation extends forward to the stomach 

 and liver. 



The vagina is relatively long. It is nar- 

 row anteriorly, and has no distinct fornix. 

 The nuiscular coat is thick and consists 

 chiefly of circular fibers. The nmcous mem- 

 brane forms longitudinal folds. The canals 

 of Gartner are usually absent. 



The vulva has thick labia which form 

 a pointed inferior commissure. The mucous 

 lining is smooth. On either side of the ure- 

 thral orifice there is a small depression. The 

 glandulte vestibidares majores are absent, 

 but the smaller glands are present, and 

 their ducts open ventrally on either side 

 of a median ridge. The vestibular bulbs 

 are relatively large and join dorsally. The 

 clitoris has a small pointed glans, beneath 

 which is a diverticulimi. The corpus caver- 

 nosum is a little more than an inch (ca. 3 to 

 4 cm.) long in a subject of medium size, and 

 is infiltrated with fat. 



The mammary glands are usually ten in 

 number, and are arranged in two series extending from the posterior i^art of the 

 pectoral region to the inguinal region ; they are, therefore, designated according to 

 location as pectoral, abdominal, and inguinal. The teats are short, and present 

 on their apices six to twelve small orifices of the excretory ducts. 



Via. 418. — Genital Organs of Bitch. 

 Vulva, vagina, and uterus (in part) are slit 

 open, a, Ovarian bursa; b, same opened to sliow 

 the right ovary ,c; d,d, horns of uterus; e,e',body 

 of uterus; /, necli of uterus; /', os uteri; (7, vagina; 

 h, hymen; i, vulva; k, external urethral orifice; /, 

 urinary bladder; ?n, urethra; n, n, labia vuIvjb; o, 

 fossa clitoridis; p, clitoris. (After Ellenberger, in 

 Lei.sering's Atlas.) 



