ZOOLOGICAL POSITION AND STRUCTURE 29 



glands and glands in the hind-feet, but may retain 

 small glands in the fore-feet, although these are 

 frequently absent.^ 



The ears may become pendent in domesticated 

 breeds of both sheep and goats, and this may be 

 accompanied by the abortion or loss of the horns ; 

 but no goat grows a tail equal in length to that of 

 many breeds of domesticated sheep, although in 

 some tame goats this appendage loses the short 

 and frequently cocked character distinctive of the 

 wild species. 



Certain differences distinguish the skulls of 

 the more typical sheep from those of the more 

 typical goats ; and Sir Richard Owen ^ has recorded 

 a number of osteological characters which he 

 regarded as differentiating the skulls of domesti- 

 cated English sheep from those of domesticated 

 goats, but several of these do not appear to hold 

 good when other breeds and species are taken into 

 consideration. 



Generally speaking, it may be stated that in 

 sheep the skull (see figure on page 20) is broadest 

 across the sockets of the eyes, which are prominent, 

 and then narrows rapidly in front of them ; while 

 the planes of the occiput (including the parietal 

 region) and the forehead meet one another at little 

 more than a right angle. The portion of the skull 



* See Pocock, Proc. Zool. Soc. London, p. 864. 



' Anatomy of Vertebrates, vol. ii. p. 475, London, i866. 



