Studies on Avian Anatomy. — II. 
41 
Fig. 42. Lateral view of pecten of the eye. 
Fig. 43. Pecten viewed from its free apex. 
Fig. 44. Ventral view of roof of month. 
Fig. 45. Dorsal view of floor of mouth. 
Fig. 46. Dorsal view of sacral plexus. 
Fig. 47. Ventral view of viscera. 
Fig. 48. Postero- ventral view of viscera. 
Fig. 49. Lateral view of viscera, showing intestinal convolutions. 
The dotted lines represent portions of the intestine covered by super- 
ficial folds. 
Plate VI. 
Aeronautes melanoleucus. 
Fig. 50. Superficial view of muscles of chest. 
Fig. 51. Muscles of shoulder and chest. 
Fig. 52. Superficial muscles of back and outer wing. 
Fig. 53. Ventral view of left upper arm. 
Fig. 54. Dorsal view of left upper arm. 
Fig. 55. Median view of left upper arm. ; 
Fig. 56. Muscles of wing and those of back inserting on it. 
Fig. 57. Patagial muscles seen from the front. 
Fig. 58. Female urogenital organs, ventral view. 
Plate VII. 
Geococcyx calif ornianus. 
Fig. 59. Ventral view. 
Fig. 60. Lateral view of head. 
Fig. 61. Dorsal view. 
