NATURAL SCIENCKS OF PHII-ADKLPUIA. 233 



<ie.!i. Char. Hill shorter than the head, compressed, exceedingly stout, 

 oVitiisH at the end ; culmen straight to the nostrils, then very convex to the 

 decurved and a<nite tip of the upper mandible. Commiss^r^' slightly sinuate 

 at the base, straight to near the tip, when; it is suddenly dellectted. Gonys 

 regularly convex, the angle scarcely appreciable. Upper nianilible(H)veivd with 

 soft skin from tlie base to the nostrils, between which are two fossse, tlie an- 

 terior shallow aii<l oblong, the posterior triangular and deep, opening into the 

 bare loral space : the two separated by an oblique ridge. Nostrils situated 

 near the extremity of the anterior fossa. Outer three or four primaries ab- 

 ruptly attenuated near the end. Tarsus much abreviated, comparatively 

 stout, about three fourths the middle toe and claw. Middle and outer toe 

 nearly e<iual. Ijobes of toes broad, connected at base for a greater distaiuie 

 than in other genera. 



1. PoDiLYMHUS i'odheps (Linn.) 



Colipiibus jwdicpjis, Linn., 1760. Pod/li/mhus pod. Lawr., lS5b. Podil. 

 linentits, Heerm. , ] S.'i4. Cali/mlms hidovicianus, Gmel., 1788. Podiceps 

 litdov. Lath., 171)0. Pod. carolhiensis, Laih., 1790. Si/llieoci/dns carol., 

 Bon., 1838. 

 Habitat. Continent of North America. 



