PLATE IX 



The Irides of Snakes 

 (Ida Mann) 



Fig. 1. — Royal i)\-tli(in. /'i/llion rcijiiis 



Fig. 3. — Kmih im- nake, Elaplie 

 qaiUuuiii tmiitd. 



Fig. 2. — Roticulated python, Pythoit, 



retic/ilatiis. 



Fjg. 4. — J31ack-and-g(jW trL-L'--^nake. Boii/u dcii- 

 drophiln. The edges of the brown and yellow 

 scales below the eye are seen. 



Fig. .5. — Emerald tree-snake. Passciita pni-siiin. 

 A. right eye; aphakic area on right. The 

 outline of the lens can be seen. The green 

 scales surrounding the eye are shown. JJ, the 

 shape of the pupil when contracted. 



Fig. (). — Chieken-snake, FJaplin ijiHidr/r/llata. 

 The edges nf the scales bordo'inu the eye are 

 also shown. 



[To /lire p. 386. 



