No. 26.] 



ARTHROSTRACA OF CONNECTICUT. 



85 



many slender setae ; propodus irregularly oval, palm convex and 

 considerably longer than posterior margin, provided with several 

 spines and numerous setae ; dactyl long and slender. 



Fig. 16. Syiiipleustes glaber. 



Pereiopods subequal in length; third, fourth, and fifth with 

 second joint expanded with posterior margin well rounded and 

 serrate. Fourth joint of last 3 pereiopods with postero-distal 

 angle acute; sixth joints longer than the corresponding ones of 

 first and second pereiopods. 



Third abdominal segment with postero-lateral angle in form 

 of a small slightly upturned tooth with a concavity above it. 



First uropods slender, with peduncle considerably longer than 

 rami which are acuminate, dorsal margin of peduncle and rami 

 with short spines ; second uropods of same form as first but 

 peduncle considerably shorter, outer ramus shorter than inner; 

 third uropods not extending as far posteriorly as second, outer 

 ramus much shorter than inner. 



