I70 REPORT OF NEW JERSEY STATE MUSEUM. 



Latter turned, strongly convex in front. Palm strongly setose, 

 with strong spine at posterior end and blunt tooth or tubercle 

 near l^ase of finger. Gills nearly round. Three posterior 

 per^eopods stout, carpus wide as long and about one-third length 

 of propodus. Palms of propodi extend nearly to base and de- 

 fined above by pair of spines. Lower margins of third and 

 fourth thoracic segments produced into laminae. Color very 

 variable, sometimes nearly colorless, ag'ain reddish or variously 

 mottled. Length of adult female 15 mm. 



Remarks. — The skeleton shrimp has been recorded from New 

 Jersey several times. According to Holmes the females do not 

 differ greatly from the males in the form of the body, though 

 of much smaller size and have the second antennae, as in the 

 young male, nearly as long as the first. In the female the second 

 gnathopoda are relatively smaller and more slender, the basal 

 joint being several times longer than broad, with the hand more 

 like that of the first gnathopods than in the male. Also the 

 ])alm has only a small projection armed with a spine at the 

 upper end, and devoid of a prominent tubercle near base of 

 dactyl. Young males differ somewhat from the adults. Their 

 antennae are of more nearly equal length with first and second 

 joints of first pair less tumid, gills more oval in outline, hand 

 of second gnathopods less stout, two spinous projections instead 

 of one near upper end of palm, and ttibercle near base of dactyl 

 small or absent. The range of the species is from Massachusetts 

 to North Carolina, living among eel-grass. My material eight 

 or nine dried examples from Cape May, all in poor preserva- 

 tion, as they were obtained many years ago. The previous New 

 Jersev records were for Beach Haven and Great Egg Harbor. 



Tribe GammaridEa. 



Head and eyes usually not greatly enlarged. Maxillipeds 

 with palps and basal lobes not joined or fused together in mid- 

 dle. Coxal plates usually well developed. Abdomen not re- 

 duced in size, and last two segments, with rare exceptions, free. 



