SUNAMPHITHOE. 429 



AMPHIPODA. P0D0CEB1DES. 



NATATOBIA. 



Genus SUNAMPHITHOE. 



Svmamphithoe. Spence Bate, Rep. Brit. Assoc. 1855, p. 59. Ann. Nat. 

 Hist. 2 ser. xix. p. 148. Cat. Amph. Brit. Mus. p. 250. 

 Synamjphithoe. "White, Hist. Brit. Crust, p. 201. 



Generic character. Like Amphithoe except that the telson 

 is developed into the form of a hook, and the three posterior 

 pairs of legs have the sixth joint dilated at its extremity. 



This genus is very near to Amphithoe t with which it is 

 very likely to be confounded. It has, however, the 

 second pair of hands more frequently larger, and the 

 walking legs have the hands developed somewhat as in 

 Isaa, having a small palm at the extremity, so that they 

 assume the appearance of being as much adapted for 

 prehension as for walking. The telson is developed into 

 a distinct and powerful hook, which is evidently a modi- 

 fication of that organ for some special purpose. It is 

 this last feature which distinguishes this genus from 

 every other of the family. As yet but two British 

 species are known. 



