96 



INTRODUCTION TO CLASSIFICATION. 



the sheep (Fig. 46) are convex, and are received into cups of 

 the mucous membrane of the uterus ; while in the Cow, on the 

 contrary, they are concave, and fit upon corresponding convexi- 

 ties of the uterus (Figs. 45 and 47). 



Fig. 45. 



Ch 



Fig. 45. Uterus of a Cow in the middle of pregnancy laid open. V, vagina ; U, uterus ; 

 Ch, chorion ; C 1 , uterine cotyledons ; C 2 , ftetal cotyledons (after Colin). 



Fig. 46. 



Fig. 46. A. Horn of the Uterus of a pregnant Ewe, laid open to show, Ch, the chorion ; 

 with Co, the cotyledons. 



B. Diagrammatic section of a Cotyledon. U, uterine wall; Co 1 , uterine cup of the coty- 

 ledon ; Co z , chorionic villous tuft of the cotyledon. 



(From a preparation in the Museum of the Royal College of Surgeons.) 



