750 



EXPLANATION OF PLATES. 



Fig. 2- Trac?iea of the Peregrine Falcon, 

 Falco peregrinus, viewed from he- 

 hind- 



a, tongue. 



b, mucous crypts toward its base. 



c, hyoid bones. 



d, e, trachea, 



f,f, last dimidiate tracheal rings. 



g, g, first bronchial half-rings. 



g, h, bronchi. 



i,j, lateral muscles. 



j, k, sterno-tracheal muscles. 



j,f, inferior-laryngeal muscles. 



Fig. 3. Last entire Ring of the Trachea. 



Fig. 4. Side View of lower part of Larynx 

 and Bronchus, shewing the inferior 

 Laryngeal Muscle. 



Fig. 5. Section of Inferior Larynx. 



Fig. (). Front View of Inferior Larynx 

 and Bronchi. 



Fig. 7. Front View of Superior Larynx. 



a, a, glosso-pharyngeal muscles. 



b, b, thyroid cartilage. 



c, c, commencement of lateral muscles. 



Fig. 8. Posterior View of Ujyper Larynx, 



a, apertor glottidis. 



b, constrictor glottidis. 



Fig. 9. Trachea of the Snowy Oivl, 

 Syrnia nyctea, viewed from before. 



a, tongue. 



b, its basal part. 



c, c, hyoid bones. 



d, e, trachea. 



f g, dimidiate rings of trachea. 



g, h, bronchi. 



i,j, lateral muscles. 



j, k, sterno-tracheal muscles. 



j,f, inferior-laryngeal muscles. 



PLATE XX. Digestive Organs of the White-tailed Sea-Eagle 

 and Golden Easle. Reduced. 



Fig. 1. Digestive Organs of the White - 

 tailed Sea-Eagle, Haliaetus Albi- 

 cilla. 



a, tongue. 



b, hyoid bones. 



b, c, d, e,f, oesophagus. 



c, d, its dilated part, or crop, 

 g, h, stomach, empty. 



h, i, duodenum, singularly elongated and 



coiled. 

 h, i, j, k, I, intestine, extremely narrow 



and elongated. 

 k, I, cloaca, 

 m, coeca. 



Fig. 2. Digestive Organs of the Golden 

 Eagle, Aquila Chtysaetns. 



a, tongue. 



b, hyoid bones. 



b, c, d, e,f, oesophagus. 



c, d, its dilated part, or crop. 

 g, h, stomach, full. 



h, i, duodenum, bent in the usual man- 

 ner, 



h, i,j, k, I, intestine of moderate length 

 and width. 



k, I, cloaca, 



m, coeca. 



