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



Third uropods with rami longer than peduncle, slender, lanceo- 

 late, spinulose; outer ramus shorter than inner. Telson small, 

 entire or (very rarely) notched, boat-shaped. 



Sympleustes Stebbing. 



Rostrum small, coxal plates moderate. 



Mandibles with molar tubercle cylindrical and with large palp, 

 the last joint of which is falciform. First maxillae with well 

 developed palp slightly dilated distally ; inner plate with two setae 

 apically. Maxillipeds with broad inner plates ; outer plates small ; 

 palp with fourth joint small. 



Second gnathopods larger than first and more pronouncedly 

 subchelate. 



Terminal uropods elongated with inner ramus longer than 

 outer. Telson small, entire. 



Sympleustes glaber (Boeck). 



1 86 1. Amphithopsis glaber Boeck, Forh. Skand. Naturfor., 

 vol. 8, p. 662. 



1899. Sympleustes glaber, Stebbing, Ann. and Mag. Nat. 

 Hist., ser. 7, vol. 4, p. 209. 



Head projecting to form a small rostrum, lateral angles rather 

 prominent and acute. Back evenly rounded. Eyes large and 

 irregularly circular. 



First antennae longer than second, about two-thirds as long as 

 body; first joint of peduncle large, cylindrical, bearing a tooth-like 

 process on ventral distal angle ; second and third segments shorter 

 than first; flagellum long and multiarticulate. Second antennae 

 with last two joints of peduncle equal in length; flagellum long 

 and slender. 



First four coxal plates deeper than wide and increasing in 

 height posteriorly, first three with small tooth-like projection at 

 postero-inf erior angle ; fourth rather deeply incised posteriorly. 

 Fifth, sixth, and seventh coxal plates low. 



First and second gnathopods not very unlike in form or size, 

 first slightly smaller than second. Fourth joint with small tri- 

 angular process at postero-distal angle and with distal margin 

 provided with several long setae ; carpus triangular, shorter than 

 propodus and about as broad, posterior angle rounded and with 



