194 REPORT OF NEW JERSEY STATE MUSEUM. 



De Kay, N. Y. Fauna. Crust., VI, 1844. p. yj (on Say). 



Wfhite,' Cat. Crust. Brit. Mus., XXV, 1847, P- 88. (Philadelphia, 



on Say's material.) 



Bate. Cat. Amph. Crust. Brit. Mus., 1862, p. 210. Pi. 2>1> fig- 6 (Say's 



example). 



S. I. Smith, Rep. U. S. F. Com., II, 1872-73 (1874), P- 653- Through- 

 out the northern States. Fragments from shad's stomach taken in Dela- 

 ware river. 



Underwood, Bull. 111. Lab. X. Hist., II, 1886, p. 357. Pennsylvania. 



M. J. Rathbun, Occas. Papers. Boston Soc. N. Hist., VII, July, 1905, 



p. 67. Fresh-water streams and ponds in New England. 



Paulmier, 58th An. Rep. N. Y. State Mus.. IV, 1904 (1906), p. 160, 



fig. 29. New York City. 

 f Gamma' us minus Say, Journ. Acad. Nat. Sci. Phila., I, 1818. p. 376. In 

 brooks under stones. 



De Kay, N. Y. Fauna. Crust., VI, 1844, p. 37, PI. 9, fig 29. (Most of 



our fresh-water streams.) (Part, sic S. I. Smith.) 



S. I. Smith, Rep. U. S. F. Com., II, 1873-74 (1875), P- 654 (remarks). 



Underwood, Bull. 111. Lab. N. Hist.. II. 1886, p. 357. New York? 



Gammarus minimus White, Cat. Crust. Brit. Mus., XXV, 1847. p. 88. United 



States (on Say's material). 

 f Lcpleiinis rivularis Rafinesque, Annals of Nature, 1820, p. 7. Brooks of 



niountaiits of Pc>uisyh'a\nia, and at Shannon Run, near Bedford Springs. 



Description. — Body slender, elongate well compressed. Eyes 

 rounded. Cephalon convex, not produced in front. Fourth and 

 fifth body seg-ments slightly angulated at hind tdgt dorsally, 

 each with three fascicles of moderately long spines, with median 

 fascicle of each segment elevated on distinct protuberance. Sixth 

 segment with lateral and median fascicles of spines. Outer rami 

 of posterior uropoda with terminal segment very narrow, styli- 

 form. devoid of lateral hairs. Inner rami with usually one or 

 two spines on inner edge. Telson divisions with spine and one 

 or two hairs on outer edge, besides few spines and hairs at tip. 

 Superior antennae half length of body, fiagellum longer than 

 peduncle, and without hairs. Inferior antennae shorter than 

 superior, peduncle extends far at end of superior, and with long 

 fine hairs. First pair of gnathopoda in male with short trian- 

 gular carpus, with a few hairs. Palm edge of propodus with 

 stout spine on middle of inner side, and two or three smaller 

 spines near tip of retracted dactylus, but no spines on posterior 

 edge proper. In female propodus only slightly narrowed dis- 

 tally, palm edge less oblique than that of male. Hind edge has 



