No. 26.] 



ARTHROSTRACA OF CONNECTICUT. 



169 



composed of only two joints of which the terminal one is minute. 

 In the male the second antennae are a little longer than the body 

 and stouter than in the female. 



Siphonoccctes smithianus. 



Coxal plates low and not contiguous, with setae on ventral 

 and anterior margins. 



First gnathopods in female with carpus as long as, but broader 

 than, propodus, with slightly convex front margin, which bears 

 six fascicles of setae; propodus tapering, simple, hind margin 



