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



ing distally, palm slightly convex and nearly transverse, prehen- 

 sile angle armed with two short, stout spines, posterior margin 

 with .1 setose convexity just distal to the middle, dactyl closely 

 fitting palm, with a single short seta on outer margin near base. 



Second gnathopods stout in male; basal joint elongated and 

 concave anteriorly ; merus twice as long as ischium and strongly 

 produced distally into a pointed lobe; carpus with posterior lobe 

 very long and narrow; propodus large, oval, palm oblique and 

 evenly convex with two short, stout spines at prehensile angle, 

 posterior margin with a small setose convexity near the palm; 

 dactyl much as in first gnathopods. In female the posterior lobe 

 of carpus not nearly so narrow and propodus smaller and more 

 oblong than in male ; palm more oblique than in first gnathopods. 



First and second uropods with rami subequal to peduncle; 

 first pair with peduncle armed above with two rows of three or 

 four spines each, last spine of inner row enormously developed 

 about two-thirds the length of rami ; each ramus with two spines 

 on upper margin and a cluster at the tip. Peduncle of last uro- 

 pods very short and stout, with a single stout spine on upper 

 margin ; ramus as long as peduncle but much narrower, furnished 

 with a cluster of spines distally. 



Telson deeply bilobed. 



General color, green to olive-brown; antennae reddish brown; 

 eyes black. 



Length 6 mm. 



Distribution : Grand Manan to Long Island Sound ; New 

 Haven, Connecticut (Smith). 



This species occurs on rocky shores high up on the beach 

 near high water; on piles, and in tide-pools. It approaches a 

 terrestrial habit like Orchestia, as it can walk upright with some 

 difficulty while out of water and hops quite readily. 



AORID^. 



Fourth coxal plate not excavate behind. 



First antennjE longer than second; third joint of peduncle 

 short; accessory flagellum present. 



First maxillae with a single seta on inner plate; second joint 

 of palp elongate. 



