50 



BLIND VERTEBRATES AND THEIR EYES. 

 Measurements (in microns} of eyes of Rhineura. 



MINUTE ANATOMY OF THE EYE OF RHINEURA. 



All the structures vary greatly in different eyes so that the terms "sometimes," 

 "usually," "frequently," etc., have to be used much more than is desirable. This 

 can not be avoided unless each eye is given a distinct description. 



c/ir.f. 



* 1 



">ii through Middle of Left Eye of Rhineura, about wo mm. Ion?. 

 B tion through Distal Part of Eye of Rhineura, showing Lens with Capsul 



-I Individual, a?s mm. long. Horizontal Section. 

 I i-ii Lena of Same Individual. 



