748 



EXPLANATION OF PLATES, 



k, k, oesophagus. 



/, /, trachea. 



m, m, its lateral muscles. 



n, n, cleido- tracheal muscles. 



p, 2), glosso -pharyngeal muscles, twisted 



round the trachea. 

 q, q, muscles which thrust out the tongue. 



Fig. 5. Head of the Green Woodpecker, 

 seen from above, shewing, 



a, a, the hyoid bones and their muscles, 

 attached to the upper jaw, near the 

 right nostril, b. 



PLATE XVI. Digestive Organs of the Grey Cuckoo, Cuculus 

 canorus. Reduced. 



Fig. 1. Digestive Organs. 



n, tongue. 



b, c, oesophagus. 



c, d, proventriculus. 

 e,y, stomach. 



g, one of its tendons. 

 c, h, i, j, k, intestine. 



Fig, 2. Proventriculus and Stomach laid 

 open. 



a, b, belt of proven tricular glands. 



b, c, d, inner membrane of stomach. 



Fig. 3. Another Stomach laid open, 

 shewing the hairs thrust info its 

 epithelitcm. 



Fig. 4. Rectum and Coeca. 



a, d, intestine. 



c, d, coeca, unequal in size. 



Fig. 5. Tongues of four Individuals. 



a, acute. 



h, slightly emarginate. 



c. emarginate. 



d, obtuse and bristled. 



Fig. 6. Ovary and Ovidiict. 



a, eggs in progress. 



b, oviduct. 



c, rectum. 



Fig. 7. Inner Surface of Oviduct. 

 Fig. 8. Coeca of another Individual. 



PLATE XVn. Head, Mouth, and Eye of the Brown Buz- 

 zard, Buteo fuscus. Natural size. 



Fig. 1. Head. 



o, upper mandible. 



b, lower mandible. 



c, tongue. 



d, palate. 



Fig. 2. Lower Eyelid everted. 



Fig. 3. Eye and Nictitant Membrane. 



a, lower eyelid turned down. 



b, posterior bony edge of orbit, 

 e, eye-ball. 



d, cornea. 



''»/> fff nictitant membrane, drawn partly 

 over the eye. 



