INTERNAL ORGANS OF GENERATION 43 



the cervix, and their position, is useful when explorations by hand are 

 necessary in cases of inversion of the uterus. 



The utricular glands are wider than in the Mare, and have lateral 

 diverticuli. 



The muscular tunic altogether is thicker in the Cow than in the Mare ; 

 indeed, the walls of the uterus in this animal are more dense than in any 

 of the domesticated creatures, the muscles having a red tint, and being 

 continued well into the broad ligaments. 



Sheep and Goat. 



In the Sheep and Goat the disposition of the uterus is similar to that 

 of the Cow. The cornua are relatively longer, more tortuous and pen- 



Fig. 18. 



Horizontal Section of the Upper Surface of the Mucous Membrane, 

 NEAR TO A Cotyledon, of the Uterus of a non-gravid Cow: Magnified 

 180 Diameters. 



rt, Section of a Utricular Gland, and ai its Proper Structure ; bb, Mucous Glands ; cc, 

 Adenoid Tissue. 



dant, and expand more gradually from the termination of the oviducts ; 

 while the longitudinal rugae in the body and cervix are disposed in a series 

 of transverse folds in the latter, which gives them the appearance of so 

 many oratinccE. The cotyledons we have mentioned already ; they are 

 concave in their centre in these animals. 



Pig. 



In the Pig the uterine cornua are long and tortuous, and flat among 

 the intestines, which they resemble ; the body of the uterus is short, and 

 the numerous irregular ridges on the inner surface of the cornua gradu- 

 ally subside towards the cervix, where they form two or three series of 

 thick, soft rugai. The os uteri is marked by a series of narrow, close-set, 

 longitudinal laminae, but there is no labial or valvular projection into the 

 vagina ; so that there is no exact limit between the two cavities. The 

 broad ligaments resemble the mesentery. The utricular glands divide 

 repeatedly in the deeper parts of the mucosa, as in the Mare. 



Bitch and Cat. 



In the Bitch and Cat the cornua are long, slender, straight, and slightly 

 compressed, with a number of flat eminences on their inner surface. 

 They extend to the lumbar region, and unite externally for nearly two 

 inches before they join the corpus uteri. The interior of the latter shows 



