Described Species of Fresh Water Crustacea. 355 



3. B. VERNALIS Verrill. Amer. Jour. Science, 2d ser., 

 xlviii, 25 (1869); Proc. A. A. A. S. for 1869, 622. Packard. 

 7th Rep. U. S. Geol. Survey (Hayden), 622 (1874); 12th Rep. 

 U. S. Geol. Survey (Hayden), ii, 342 (1883). Gisthr. Amer. 

 Nat. xv, 136 (1881). Hay. Amer. Nat. xvi, 242 (1882). 



Hob. Massachusetts, Rhode Island, Connecticut, New York, Penn- 

 sylvania, Ohio, Indiana. 



IV. CHIROCEPHALUS PREVOST. 



1. C. HOLMANI Ryder. Proc. Phila. Acad. 1879, 148. Pack- 

 ard. 12th Rep. U. S. Geol. Survey (Hayden), ii, 351 (1883). 

 fferrick. Bull. Scientific Lab. Denison Univ. i, 19 (1885). 

 Hob. New York, Pennsylvania, Minnesota. 



V. STREPTOCEPHALTJS BAIRD. 



1. S. FLORIDANUS Packard. Amer. Nat. xiv, 53 (1880); 

 12th Rep. U. S. Geol. Survey (Hayden), ii, 350 (1883). 



Hab. Florida. 



2. S. SEALII Ryder. Proc. Phila. Acad. 1879, 200. 

 Packard. 12th Rep. U. S. Geol. Survey (Hayden), ii, 348 



(1883). 



Hab. New York, New Jersey. 



3. S. TEXANUS Packard. Amer. Jour. Science, 3rd ser., ii, 

 111 (1871); 7th Rep. U.S. Geol. Survey (Hayden), 622 (1874); 

 12th Rep. U.S. Geol. Survey (Hayden), ii, 345 (1883). 



S. Watsoni Packard. Bull. U. S. Geol. Survey (Hayden), 

 iii, 176 (1877). 



Hab. Kansas, Texas. 



VI. THAMNOCEPHALUS PACKARD. 



1. T. PLATYURUS Packard. Bull. U.S. Geol. Survey (Hay- 

 den), iii, 175 (1877); 12th Rep. U. S. Geol. Survey (Hayden), 

 ii, 353 (1883). 

 Hob. Kansas. 



