No. 26.] 



ARTHROSTRACA OF CONNECTICUT. 



137 



about three times as long as third ; principal flagellum slender and 

 longer than peduncle, provided with abundant setse on lower 

 margin; accessory flagellum as long as terminal joint of peduncle, 

 consisting of three joints. Second antennae much shorter than 

 first, but with longer peduncle ; gland cone slender and not large, 

 third joint twice as long as wide, fourth joint slightly shorter 

 than fifth, which in turn is as long as the six- or seven- jointed 

 flagellum. 



Lembos smithi. 



Coxal plates small and provided with a few short setae; the 

 first four subquadrate and much longer than high. 



First gnathopods very stout, with basal joint short, not more 

 than twice as long as broad ; carpus as broad as long and cup- 

 shaped, posterior margin densely setose; propodus broader and 

 longer than carpus ; oval in form, with palm sinuous, posterior 

 angle prominent and armed with a stout j spine, posterior margin 



