STALK-EYED CRUSTACEA 65 



only flat, but also wide above. They are naked, but 

 the grooves which separate them have hairs. The 

 gastric region has three small tubercles, and the hepatic 

 region has a strong tooth. The gastric region and the 

 sides of the branchial regions are hairy. The rostrum 

 is a little longer than the interorbital diameter. It is 

 hairy above. The abdomen and the sternum are hairy. 

 The sternum of the male has deep excavations between 

 its segments ; these excavations are wider than the ridges 

 which separate them. 

 Range.— St. Vincent. 



Carapace very convex. Praeocular spine present. 

 Spines of rostrum flattened, contiguous, and produced 

 at their extremities into a lateral lobe. Basal joint of 

 external antennae much enlarged. First pair of legs 

 with the palm compressed, but not carinated. Walking 

 legs of moderate length. 



Range. — Mediterranean Sea, West Indies. 



I. Lissa chiragra. 



Lissa cliiragra . . H.Milne Edwards, Leach, Risso. 



Pisa chiragra . . Latreille. 



Cancer chiragra . . Herbst. 



InacJius chiragra . Fabricius. 



Carapace almost hexagonal, about one quarter longer 

 than broad, contracted in front, very strongly embossed, 

 5 



