STALK-EYED CRUSTACEA 443 



The first segment of the abdomen has three spines, 

 one median, two lateral ; the second, third, fourth, and 

 fifth segments have strong median spines. 



Range. — Gnadaloupe, Dominica. 



3. Pentacheles validus. 



PentacJieles validus . . A. Milne Edwards. 



The carapace is flat, and wider in the branchial than 

 in the gastric region. The frontal border has in the 

 middle line two small rostral spines, another spine at the 

 internal orbital angle, and some spines on its edge. The 

 ocular notches are triangular, very narrow and deep ; 

 the external orbital angle is spinous. The lateral edges 

 are finely toothed; the middle line of the carapace is 

 projecting and granular, as well as the line behind the 

 gastric region, and which forms a notch of the lateral 

 edge. 



The basal articulations of the internal antennae are 

 lamellar, much dilated within, and in contact along their 

 whole length along inner border ; they terminate in a sharp 

 point, and have a small spine at their external angle ; the 

 external flagellum is very small. The internal antennae is 

 longer than the external. 



The eye is armed in front with a spine. The five 

 first segments of the abdomen have an obtuse keel 

 above terminating in front in a point ; from this point 

 on each side a deep groove is directed backwards and 

 outwards. 



The anterior legs are long. The fourth joint has 

 four spines below ; the fingers of the pincers are crooked 

 and unarmed. There is a small spine on the seventh 

 joint. 



Range. — Martinique, Dominica. 



