No. 26.] 



ARTHROSTRACA OF CONNECTICUT. 



59 



Orchomenella pinguis. 



convex. Second gnathopods with propodus oblong, densely 

 setose, postero-distal angle produced; dactyl j very small; carpus 

 considerably larger than propodus with posterior margin strongly 

 convex. 



Posterior pereiopods short with basal joints broadly suboval 

 and shorter than rest of limb. Coxal plates large, those of first 

 four appendages being more than twice as deep as their cor- 

 responding segments; the fifth is much deeper than wide, with 



