NIPHARGUS AQUILEX. 
315 
AMPHIPODA. 
NAT ATOM A. 
GAMMARTDES. 
Specific character. Very long and slender. Coxes of all the legs not 
so deep as the segments to which they are attached. First three segments of 
the tail nearly of equal depth, with their posterior angles rounded. Gna- 
thopoda very small and equal, having the propoda triangular ; the superior 
and inferior margins and palm being of nearly equal length, with the angles 
rounded off. First and second uropoda very short. 
Length g inch. 
Niphargus aquilex. 
Niphargus stygius. 
Gammarus puteanus, var. 
Gammarus puteanus. 
Gammarus puteanus. 
Schiodte, Comm. Soc. Reg. Dan. 1855, p. 850. 
Nat. Hist. Review, i. p. 41, fig. jb. White, 
Hist. Brit. Crust, p. 187. 
Westwood, Proceed. Linn. Soc. No. li. p. 218, 
April 19, 1858. Spence Bate, Ann. Nat. 
Hist. 2 ser. xix. Cat. Amph. Brit. Mus. p. 174, 
pi. xxxii. fig. 1. (but query of Schiodte.) 
Koch, in Contin. of Panzer, Ins. Germ. No. 186, 
pi. 22 ; and Deutschl. Crust. Myr. u. Arach. 
heft 36, No. 22. 
De la Yallette St. George, De Gammaro 
puteano, pi. i. fig. 5. 
Caspary, in Verhandl. d. Naturf. Yereins fur 
Rheinland, Jahrg. 6, Bonn, 1849, p. 39, 
t. 2, f. 1-19. Hosius, De Gammari Specie- 
bus, Diss. Acad. 26 Jul. 1850, Bonnse, p. 20, 
tab. 1, fig. 7, 12. tab. 2, fig. 22 ; also in Wieg- 
mann’s Archiv. 1850, i. p. 235. 
