50 CONNECTICUT GEOL. AND NAT. JUST. SURVEY. 



[Bull. 



L. Uropod 3 biramous; antenna i long ■ ■ ■ ■ 



Dexamine p. iiS 

 LL. Uropod 3 uniramous; antenna I much 

 shorter than antenna 2 (Orchestiidae). 

 M. Maxilliped with 3-jointed palp; an- 

 tenna I' shorter than peduncle of 

 antenna 2. 

 N. Gnathopod I of female subchelate 



Orchestia p. 118 

 NN. Gnathopod i of female simple . . 



Talorchestia p. 122 

 MM. Maxilliped with 4-jointed palp; an- 

 tenna I longer than peduncle of 

 antenna 2. 

 N. Gnathopod 2 in male with carpus 



^asked by merus Hyale p. 126 



NN. Gnathopod 2 in male with carpus 

 produced between merus and pro- 

 podus. 



O. Telson undivided Hyalella p. 128 



00. Telson cleft AUorchestes p. 131 



II. Pereiopods i and 2 glandular; coxal plate 4 

 not excavate behind. 

 J. Gnathopod i much larger than gnathopod 2 

 (Aoridae). 

 K. Gnathopod i in male with carpus pro- 

 longed to form a strong thumb-like 



process Microdeutopus p. 133 



KK. Gnathopod i in male with carpus not so 



produced Lembos p. 136 



JJ. Gnathopod i never much larger than gnath- 

 opod 2, usually smaller. 

 K. Uropod 3 biramous. 



L. Rami of uropod 3 not uncinate 

 (Photidae). 

 M. Rami of uropod 3 very unequal in 



size Photis p. 139 



MM. Rami of uropods 3 not very un- 

 equal in size. 

 N. Antenna i with third joint of pe- 

 duncle shorter than first 



Leptocheirus p. 143 

 NN. Antenna i with third joint of pe- 

 duncle longer than first 



Podoceropsis p. 141 

 LL. Rami of uropod 3 very short, outer 

 one uncinate. 



