42 



THE FUNDUS OCULI OF BIRDS 



Fig. 48. 

 Blue Snow Goose (Chen cwrvlescens) . 



Fig. 51. 

 Cormorant (Phalacrocorax carbo). 



Fig. 49. 



Red-billed Tree Duck (Dendrocygna autumnalis 

 discolor). 



Fig. 52. 

 Secretary Bird (Serpentarius cristatus). 



Fig. 50. 

 Gannet (Sula bassana). 



Fig. 53. 

 Lammergeier (Gypaetus barbatus). 



Diagrams of the Pecten as seen by the Ophthalmoscope in Various Species of Birds. 



