198 



GAMMARlDiE. 



AMPIIIPODA. 



NATATOBIJ 



PHOXIDES. 



UROTHOE BREVICORNIS. 



Specific character. Inferior aiitennte not longer than the peduncle of the 

 superior, and not furnished with spines on the superior margin. Branches 

 of the terminal caudal appendages not hirsute. 



Length 5*^ inch. 

 Urothoe brevicornis. Spence Bate, Cat. Amph. Crust. Brit. Mus. p. 116, 

 pi. XX. fig. 1. 



This animal bears so close a resemblance to Urothoe 

 marinus, that since it was originally described, we have 

 much doubted whether it had not better have been 

 described as a variety only. It may be that the dis- 

 tinctions are those of sex, but the habitats as yet re- 

 corded are very widely apart. 



The antennae are very similar to those in U. marinus, 

 but the inferior are rather shorter, and are not furnished 

 with those strong spines on the superior margin of the 

 first joint of the peduncle, which form so remarkable a 



