Figs. 554 to 561. — The Eyes of Placentals. 



Fig. 554. — The lynx, 

 Felis lynx. 



Fig. 555. — The seal. 

 Phoca grcenlandicu. 





Fig. 556. — The marmot, 

 Marmota alpinn. 



Fig. 559.— The wolf, 

 Cams lujnis. 



Fig. 557. — The horse, 

 Equus caballus. Note 

 the flocculus ill the 

 pupil. 



Fig. 558. — The porcupine, 

 Hystrix cristata. 



Fig. 560.— The elephant, 

 Elephas ■maximus. 



Fig. 561. — The monkej', 

 Simia inuus. 



A selection of Soemmerring's engravings illustrating in natural size the 

 lower half of the liemisected left eve in each case. 



