G94 ANATOMY OF VERTEBRATES. 



In the Tapir the ovaria are small subcompressed oval bodies, 

 in a widely open peritoneal pouch ; the oviducts have a tortuous 

 course along the pouch near its margin to the uterine horns, 

 which are long, and longitudinally multiplicate within : the body 

 of the uterus is but two inches long, the ' os tincse ' not very 

 prominent : the vagina is long; a constriction divides it from the 

 urogenital passage, which is short. The clitoris and Malpighian 

 canals resemble those of the Rhinoceros. 



In the Mare the ovaries, of an elongate reniform figure, are 

 inclosed and concealed in large peritoneal sacculi, fig. 574, z, to 

 the mouths of which the fimbriated extremities of the oviducts are 

 attached. The inner surface of the pavilions are characterised by 

 numerous narrow, close-set, minutely plicated laminae. The ovi- 

 ducts have a wavy course to the horns of the uterus, which are a 

 little longer than the body or common cavity ; short oblique 

 wavy folds of the lining membrane, much developed in the im- 

 pregnated state, fig. 575, t, project into the interior : a few similar 

 folds are present in the body of the uterus, together with others 

 which are broader and disposed more longitudinally at the cervix. 

 The os uteri, ib. /, is denoted by the sphincteric thickening of 

 the muscular coat and the contraction of the canal; but there 

 is little or no valvular projection into the vagina. Of this canal, 

 k, the inner surface is increased by numerous irregular longitu- 

 dinal folds : a constriction defines the vagina from the urogenital 

 passage, ib. d\ the urethra, ib. e, opens near the constriction, 

 behind a rugous prominence or flap, ib. f. The orifices of many 

 follicles are dispersed over the comparatively smooth surface of 

 the urogenital passage. The trilobate 'glans clitoridis,' ib. a, 

 projects from its preputium close to the anterior margin of the 

 vulva. It is provided with ( erectores ' muscles and a ' plexus 



retiformis ' : the sphincter of the uro- 

 genital passage is very powerful. In 

 the Filly the communication of the va- 

 gina with the urogenital canal is di- 

 es o 



vided by a longitudinal septum or 

 ' hymen.' The Zebra and Ass closely 

 agree with the Mare in the structure of 

 the female organs. 



f 391. In Artiodactyla. — The ova- 



Ovarmm of Sow ; nat. size. 3 «/ 



ria of the Sow, fig. 545, are large 

 oblong bodies with an irregular and tuberculate surface : when 

 the ovisacs enlarge, the stroma is scanty in proportion. Each 

 ovarium is inclosed within a peritoneal sac, near the aperture of 



