104 



EVOLUTION OF THE 11 r MAN EYE 



secreting surface. The secretion from the glands has a 

 strong musky odor, and these suborbital pits reach their 

 greatest size in animals which possess an acute sense of 

 smell; especially is this so in animals such as deer and 



/Ccngaro 



j4t>^k lopt. 



Fig. 24. — Showing the arrangement of parts at the inner canthus in different 



mammals. 



antelopes, in whom smell is what may be termed a "distance- 

 sense," in contradistinction to a contact-sense, such as it is 

 in most of the Carnivora. These odoriferous glandular 

 organs probably form a means by which a stray member 



