52 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



palp; first maxillse with narrow inner plate furnished with two 

 apical setse, palp 2- jointed; maxillipeds with inner plate narrow 

 and extending beyond middle of outer one, outer plate oval, inner 

 margin devoid of spines ; palp narrow. 



First gnathopods stout, simple ; second gnathopods slender, 

 ischium elongated, propodus short and setose, with dactyl very 

 small, near middle of distal margin of propodus. 



Postero-lateral angle of third abdominal segment rounded. 



Uropods biramous. Telson entire. 



Lysianopsis alba Holmes. 



1903. Lysianopsis alba, Holmes, Amer. Naturalist, vol. 37, 

 p. 276. 



1905. Lysianopsis alba, Holmes, Bull. Bur. Fish., vol. 24, 



P- 475, pl- 5, %• I- 



Interantennal lobes prominent and rounded; eyes large, oval. 



First antennas short with basal joint of peduncle stout, and 

 longer than the next two ; principal flagellum a little longer than 

 peduncle ; accessory flagellum one-half the length of the principal 

 one. Second antennae about as long as first, with flagellum as 

 long as peduncle. 



First gnathopods simple, stout, basal joint broad; carpus 

 somewhat inflated; propodus tapering distally, dactyl moderately 

 stout. Second gnathopods very long and slender; merus densely 

 setose on convex posterior margin ; carpus long, with both front 

 and hind margins convex, densely setose anteriorly ; propodus 

 subcordate, small, densely setose ; dactyl very small. 



Posterior group of pereiopods increasing in length rapidly 

 posteriorly, the last pair quite long and slender and having poste- 

 rior margin of basal segment serrated ; two preceding pairs 

 with basal segments similarly serrated. 



Fourth abdominal segment slightly indented dorsally. 



First uropods extending further back than second, which 

 extend further back than the third; rami of first pair nearly as 

 long as peduncle, styliform; peduncle of last uropods very stout, 

 longer than the rami and produced into a triangular projection 

 at distal end of upper margin. 



Telson oblong, entire, rounded distally. 



