458 



THE EYE IN EVOLUTION 



Fig. 579. — The Tapetum Fibrosum of the Horse. 



Showing the dense closely-woven layex' of fibrous tissue ; ch, choroid 

 r, retina ; s, sclera ; <, tapetum ( X 126) (Norman Ashton). 



Peccary 



^ n. V* •« ^ \ 



Fig. 580. — The Tai'I'Ti.m (i: 



^UM OF THE Kitten. 



Note the beautifully an-anged tiers of endothelial cells traversed by small 

 vessels running from the choroid to supply the choriocapillaris. c, chorio- 

 capillaris ; cJt, choroid ; r, retina ; t, tapetum ( ;■; 375) (Norman Ashton). 



(including the elephants) with the exception of the Suoidea (pig, 

 peccary, liippopotamiis) and the Tylopoda (camels, llama) ; it also 

 occurs in the Cetaceans (whales and doljDhins), in two Rodents, the 

 spotted cavy, Cuniculus, and the flying squirrel, Pferomys magnificus, 

 niid in the only nocturnal Antln-opoid (the night monkey, Nycfipithecus, 

 iji which it is extremely brilliant). 



