S6 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



First four coxal plates more than twice as deep as corresijond- 

 ing segments; first pair with front margin considerably shorter 

 than hind one; first and second coxal plates with a minute 

 triangular prolongation at the postero-ventral angle ; fourth plate 

 deeply excavated behind to accommodate the fifth which is 

 deeper than wide and bilobed. 



First gnathopods of male with merus with hind margin pro- 

 longed distally and having severa], long spines and fine cilia; 

 carpus triangular, as long as propodus and broader, with a 

 dense patch of short cilia on the short hind margin; propodus 

 subrectangular, with oblique palm which is slightly uneven and 

 finely serrated, prehensile angle prominent and armed with two 

 stout spines. Second gnathopods with short merus having a patch 

 of dense cilia on the convex hind margin; carpus greatly 

 elongated, broadening somewhat distally, with a patch of short 

 cilia situated near proximal end of hind margin and one near 

 distal end of front margin, which also bears several long setae; 

 propodus only -slightly longer than wide, densely setose and pro- 

 duced slightly to form a very weak chela with rudimentary dactyl. 



Third, fourth, and fifth pereiopods with basal joints expanded 

 and serrated on posterior margins. 



Third abdominal segment with postero-lateral angle not pro- 

 duced, but forming nearly a right angle. 



First and second uropods with styliform rami; the first pair 

 extending beyond the second pair; third pair extending slightly 

 beyond the first; rami foliaceous, inner one extending scarcely 

 farther than basal joint of outer, inner margins of rami with setae, 

 outer margins with short strong spines. 



Telson flat, twice as long as wide, cleft nearly to the base, 

 each apex provided with a small spine. 



Length 13 mm. 



The species is represented by four specimens collected by 

 Professor Verrill ofif Stonington, Connecticut, in April, 1873, 

 in sand at a depth of " 4-6 f ." 



It is distinguished from T. cicada by the shape of the eyes 

 which in the latter species are narrow above and dilated below ; 

 by the presence of a definite prehensile angle on the propodus of 

 the first gnathopod ; by the form of the postero-lateral angle of 



