PLATE VII 



The Eyes of Chelonia^js 



•t-'* 



Fig. 1 . — The iris of the painted turtle. 

 Chrysemys picta (Ida Mann). 



Fig. 2. — The iris of the European pond-tortoise, 

 Emys orbicularis. A, thin circiunpupillary 

 zone ; B, capiUary plexus ; C, zone of large 

 vessels hidden by pigment (Ida Mann). 



J'"lU. 3. The fundus of (.'//V.C'.v rrosn il.iii(l-a\ .J < ihli>( ill ). 



■a 



i^'ji;. 4. — ■I]i« iiiiidus of the ijurgoma river turtle, Einyda 

 i/ranosa (Lindsay Johnson), 



S.O. VOL. I 



[To face p. 372. 



