652 Eepobt of State Geologist. 



B. Order LONGIPENNES. 



LONG- WINGED SWIMMERS. 



o^. Covering of upper mandible of three distinct pieces ; a terminal hook, a lateral 

 piece, and a cere-like piece overhanging the nostrils. 



STEECORABIlDiE. — JaEGERS, EtC. IV 



a^. Covering of upper mandible of a single piece pierced by the nostrils. 



Laeid^. — Gulls and Tbeks. V 

 [Included in this order are the Khynchopidfe or Skimmers, the limits of whose range do 

 not reach this State. The ahove key is not intended to include them.] 



C. Order STEGANOPODES. 



DARTERS, PELICANS, CORMORANTS. 



;?. 0^. Upper mandible hooked at tip. 



3, b^. Tarsus moderate, much longer than hind toe with claw. 



^ f^. Bill shorter than middle toe, compressed; gular sack small. 



PhALACEOCOEACID^. — COKMORANTS. VII 



*f,c^. Bill much longer than middle toe, much flattened; gular sack very large. 



PELECANIDiE. — PELICANS. VIII 



3i !>'. Tarsus very short, not longer than hind toe with claw ; wings and tail 

 excessively long, the latter deeply forked. 



Febgatid^. — Man-o'-Wae Birds. IX 

 ;2, «■'■ Upper manible not hooked at tip. Bill slender, nearly straight; tail long, 

 feathers very broad ; neck very long and slender. 



Anhingidje. — Dabtees. VI 



D. Order ANSERES. 



DUCKS, GEESE AND SWANS. 

 Characteristics the same as the order. Anatid.e. — Ducks, Etc. X 



E. Order HERODIONES. 



HERONS, STORKS, IBISES, Etc. 



a'. Sides of upper mandible with a deep, narrow groove extending from the nos- 

 trils to the tip. 

 6^. Bill very broad, much flattened, and greatly widened toward the tip, only 

 the end bent down. Plataleidjb.— Spoonbills. XI 



b^. Bill slender, nearly round, gradually bent downward for nearly its whole 

 length. IBIDIDJ5.— Ibises. XII 



a'. Sides of upper mandible without groove. 



f'. Middle toe nail with comb-like inner edge; claws narrow, arched, and 



sharp pointed. Aedeidje.— Herons, Etc. XIV 



c2. Middle toe nail with comb-like edge ; claws broad and flat, resting on 



a horny pad or shoe. Ciconiidje.— Storks, Etc. XIII 



