252 PHILOSOPHY OF ZOOLOGY. 



Gape not reaching to the eye. The nasal membrane is 

 extended. The head thinly covered, the feet reticulated. 



1 54. Gnus. Tongue pointed. Part of the head naked. 

 Grus vulgaris. 



155. PSOPHEA. Trumpeter. Tongue fringed. Head 

 with downy feathers. P. crepitans. 



(b.) Nostrils opening simply in the bill, and somewhat 

 dorsally. 



Bill slightly notched. 



156. TANTALUS. Upper mandible rounded above. 

 Part of the head naked. T. loculator. 



Bill plain. 



Mandibles receding from each other in the middle of 

 their course. 



157. ANASTOMUS. The edges of the mandibles at the 

 .open space appear as if worn. 



Mandibles uniting. 



Bill bending upwards. 



158. MYCTERIA. Tabiru. Upper mandible triangular. 

 Tongue minute. 



Bill not bending upwards. 



159. SCOPUS. Umbre. Bill slightly arched. Dorsal 

 ridge of the upper mandible swollen at the base. S. um- 

 brella. 



160. CICONIA. Stork. Bill straight. C. vulgarit. 



PRESSIROSTRES. The mandibles never possess a cut- 

 ting edge throughout their whole length. In general, the 

 edges are more or less rounded, and the whole bill exhibits 

 a feebleness strikingly different from the strong bills of the 

 preceding group. 



