STALK-EYED CRUSTACEA 261 



4. Frevillea. 



Frevillea ... A. Milne Edwards. 



The front is deflexed, the ocular peduncles arc 

 elongated ; the orbits are well defined, and occupy the 

 width of the space between the front and the antero- 

 lateral angles. The basal antennal joint is short and 

 wide, that of the internal antennae is long and round ; the 

 two first joints of the flagellum are very long, and extend 

 beyond the front, where they are folded. The buccal 

 cavity is wider in front than behind, and its anterior 

 border has two fissures on each side. The epistome is 

 large. The first pair of legs is subequal and terminate in 

 pointed fingers ; the arms scarcely exceed the borders of 

 the carapace. The walking legs are long, thin, and com- 

 pressed. The male verges arise directly from the coxal 

 joint of the last pair of legs. 



Range. — West Indian Sea; in deep water. 



Synopsis of the Species. 



1. A small tubercular swelling behind external orbital 

 angle. — {F. jvscra.) 



2. Antero-lateral borders have two teeth. — {F. sigsbci.) 



3. Antero - lateral borders have three teeth. — {F. 

 ti-idcntata.) 



I. Frevillea rosaea. 



Frevillea roscva . A. Milne Edwards. 



The carapace is thick, enlarged in front ; the 

 lateral borders are almost parallel. The front is wide 

 and straight. The ocular peduncles are large. The 

 postorbital angle is formed by a pointed tooth, behind 



