Described Species of Fresh Water Crustacea. 357 



2. G. FASCIATUS Say. Jour. Phila. Acad. i, 379 (1817). 

 Ik Kay. Nat. Hist. N. Y. vi, 37 (1844). Smith. Rep. U. S. 

 Fish Cora, for 1872-73, Q^. Forbes. Bull. 111. State Lab. N. 

 H., No. 1, 6 (1876). 



Hab. Maine ( VerrilT), Connecticut (Smith), Pennsylvania (Say), 

 Illinois (Forbes), Michigan (Milr.er), Wisconsin ( Verri.ll). 



3. G. LIMN^US Smith. Rep. U. S. Fish Com. for 1872-73, 

 651, 694; 7th Rep. U. S. Geol. Survey (Hayden), 609 (1874). 



G. lacustris Smith. Amer. Jour. Science, 3rd ser., ii, 453 



(1871). 



Hob. Michigan, Lake Superior and Colorado (Smith). 



4. G. MINUS Say. Jour. Phila. Acad. i, 374 (1817). De- 

 Kay. Nat. Hist. N. Y. vi, 37 (1844). Gould. Invertebrata 

 of Massachusetts, 334 (1841). Smith. Rep. U.S. Fish Com. 

 for 1872-73, 654. 



.Kevf York(?). 



5. G. BOBUSTUS Smith. 7th Rep. U.S. Geol. Survey (Hay- 

 den), 610 (1874). 



Hab Colorado (Smith). 



FAMILY LYSIANASSID^B. 

 I. PONTOPOREIA KROYER. 



1. P. FILICORSTIS Smith. Rep. U. S. Fish Com. for 1872 

 -83, 649. Forbes. Bull. 111. State Lab. N. H., No. 1, 20 

 (1876). 



Gammarus filicornis Stimpson MSS. 

 Hab. Lake Michigan (Stimpson). 



2. P. HOYI Smith. Rep. U. S. Fish Com. for 1872-73, 

 647, 694. Forbes. Bull. 111. State Lab. N. H., No. 1, 20 

 (1876). 



P. affinis Smith. Amer. Jour. Science, 3rd ser., ii, 452 

 (1871). * 



Gammarus Hoyi Stimpson MSS. 

 Gammarus brevistylus Stimpson MSS. 

 Hab. Lake Michigan (Stimpson), Lake Superior (Smith). 



