108 Dr. R. J. Lee on the Sense of Sight in Birds. [Jan. 9, 



Axis of 

 Vision. 



Eagle Owl 3-7 



Vulture 3-1 



Buzzard 4 



Rhea americana . . 3 

 Flamingo 



Ciliary 

 Muscle. 

 1 

 1 

 1 

 1 

 1 

 1 

 1 



Axis of 

 Vision. 



Vieillot's Pheasant . . 6 

 Wood Francolin. ... 4*6 



Canada Goose 5 



Hawk-headed Parrot 4 



Spotted Dove 7 



Grouse 4 



Partridge 4 



.... 9 



Penguin 6 



Andean Goose . . 4 



1. = lateral; v. = vertical; a.p. = antero-posterior ; unit of measurement 1 inch; the 

 sign -4- denotes that actual size is greater than the mean of the two numbers, 

 — that it is less than the mean. 



Ciliary 

 Muscle. 

 1 

 1 

 1 

 1 

 1 

 1 

 1 



Cornea. 



Andean Goose 



Vieillot's Pheasant 



Wood Francolin 



Canada Goose 



Hawk-headed Par- 

 rot 



Chatterton's Fran- 

 colin 



Spotted Dove 



! Grouse 



Partridge 



1 3 

 3 2 



9_ 

 3 2 



_8_ 

 3 2 



9 



2 

 8_ 

 2 



9 



3 2 



_9_ 

 3 2 



_3_ 

 1 



5 



1 6 



4 



1 6 



Sclerotic. 



1 5 



2 



1 4 



2 



a.p. J 



1 2.7. 



l ' 3 2 



v -26. 



V * 3 2 



1 -S- 



L ' 16 



a.p-i-6 



2.9. 

 3 2 



JL4 

 1 6 



V. 



a.p. 3 2 



2JL 

 3 2 



a.p. if 



A " 3 2 

 a -P-"3^ 



1 i- 2 

 lm 2 



1 1 



1 6 



V. 



2i 

 3 2 



a.p. 3 2 



1 -2- 

 L 16 



a.p. ^ 



Lens. 



10+11 



3 2 



10-11 



Muscle. 



" 3 2 



a-P-sV 



1 



3 2 

 a.p.ii 



1 



x * 3 2 



a.p. g-g 



1- i 

 a-p. if 



A * 20 

 a.p- "2% 



1 



r 32 

 a-P. A 



1. A 



a-p.-re 



_3_ 

 3 2 



__3_ 

 3 2 



J7__ 

 64 



1 



1 6 



. 2_ 

 1 6 



_l 

 1 6" 



