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



the third abdominal segment; and by the greater length of the 

 last peduncular joint of the first antenna. 



Orchomenella G. O. Sars. 



Coxal plates large. 



First antennae with moderately developed accessory flagellum ; 

 second antennae in females slightly longer than first, not greatly 

 elongated in male. 



Mandibles with slender palp, attached behind the small molar 

 tubercle; first maxillae with outer plate very obliquely truncated 

 at tip ; maxillipeds normal. 



First gnathopods strong, subchelif orm ; second gnathopods 

 with short propodus which is dilated distally and densely setose, 

 apex slightly produced beneath the minute dactyl. 



Pereiopods short, basal joint of last three pairs laminar. 



Terminal uropods in female scarcely reaching beyond the 

 preceding pair, rami partly denticulated at the edges ; in male 

 only the outer ramus provided with setae. 



Telson reaching beyond peduncle of terminal uropods, oblong, 

 triangular, deeply incised, lobes not widely separated. 



Orchomenella pinguis (Boeck). 



1890. Orchomenella pinguis, G. O. Sars, Crust. Norway, 

 vol. i, p. 67, pi. 24, fig. 2. 



1905. Tryphosa pinguis, Holmes, Bull. U. S. Bur. Fish., vol. 



24, P- 473- 



Eyes rather large, elongated, not pigmented in alcoholic speci- 

 mens. Interantennal lobes of head produced and narrowly 

 rounded. 



First antennae short, with stout peduncle having second and 

 third joints very short; first joint of principal flagellum elongated 

 and densely setose, succeeding joints short; accessory flagellum 

 moderately developed, four- jointed, extending beyond the third 

 joint of principal flagellum. Second antennae much longer than 

 first, especially in the male in which it scarcely equals one-half 

 the body length ; peduncle short ; flagellum in male very slender. 



First gnathopods with deep coxal plate slightly narrower 

 ventrally; basal joint slender; carpus with narrow posterior lobe; 

 propodus rectangular with palm nearly transverse and slightly 



