No. 26.] 



ARTHROSTRACA OF CONNECTICUT. 



213 



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

 separated, situated in the postero-lateral angles of the head. 



FIG. 65. Spharoma, quadridentatum. 



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 ; flagellum 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; flagellum 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 



