No. 26.] 



ARTHROSTRACA OF CONNECTICUT, 



213 



duced in a small median point. Eyes small, rounded, widely 

 separated, situated in the posterolateral angles of the head. 



Fig. 65. Spharoma quadridentafuin. 



First pair of antennae inserted on under side of head and 

 fitting into groove when the animal contracts ; first joint large ; 

 second joint small and conical ; third joint longer than second and 

 cylindrical in form ; fiagellum made up of about a dozen segments. 

 Second antennae longer than first pair, likewise inserted on under 

 side of head ; first segment inconspicuous ; second segment short ; 

 third twice as long as second; fourth and fifth subequal and each 

 a little longer than the third ; fiagellum as long as peduncle and 

 composed of about fifteen segments. 



Maxillipeds with basal segment short and somewhat tri- 

 angular and with five-jointed palp. 



Segments of thorax subequal in length except the first which 

 is longer than the rest ; coxal plates distinctly marked off from all 

 segments except the first ; postero-lateral angles drawn out into a 

 narrow and subacute process which is more pronounced in the 

 first four segments. 



Legs weak, furnished with long setae, ambulatory ; dactyl in 

 each case short and robust and provided with stout curved spine 



