No. 4.] AMPHITHOE LONGIMANA SMITH. 



I6 7 



sinus near the strongly produced outer angle ; dactyl scarcely 

 projecting beyond the palm. 



In the female the gnathopods are much shorter and weaker 

 than in the male; the hand in the first pair is less elongated, 

 and the palm is more oblique and more broadly rounded at the 

 outer angle. In the second pair the sinus in the palm is not 

 so deep, and the outer angle not so prominent as in the male. 



Peduncle of the first pair of pereopods rather slender, much 

 longer than the rami, and reaching nearly to the tip of the 

 peduncle of 

 the second 

 pair; inner 

 ramusof the 

 second pair 

 of uropods 

 about as 

 long as the 



peduncle. Posterior pair of uropods with the rami 

 scarcely half as long as the peduncle ; rami subequal 

 in length, the broader, more 'or less oval inner one 

 with a short spine at the inner posterior angle and 

 several setae on the transverse distal margin ; outer 

 ramus with the usual stout hooks. Length 6-9 mm. 



In the older specimens the antennae are relatively more 

 elongated, and the hands of the male relatively longer and 

 narrower. The eyes in the living specimens are red, but 

 become black in specimens preserved in alcohol. 



Habitat. 



The range of this species as reported by Professor Smith is 

 from Vineyard Sound to New Jersey, and it has been reported 

 from Provincetown, Mass., by Richard Rathbun. It is not 

 uncommon among the seaweed near the shore, and it has been 

 taken at the surface in the vicinity of Woods Holl in the tow 

 net. Its occurrence at the surface is probably due to its 

 having been carried away from the shore by tide currents, as 

 it has a strong tendency to keep among objects of shelter. 



