196 STALK-EYED CRUSTACEA 



front. The basal anteiinal joint has a spine below the 

 insertion of its movable part. The fourth joint of the first 

 pair of legs has in front four or five wide and strong spines ; 

 there is a small spine at the extremity of its posterior 

 border. The fifth joint has granular ridges ; there is a 

 large spine on the inside and three small spines upon its 

 external face. The hand has granular ridges, and is armed 

 above with four spines arranged alternately, two upon the 

 internal edge and two upon the external border of the 

 superior face. 



The colour is usually a violet red, more or less marbled ; 

 the extremity of all the spines is black. 



Range. — St. Thomas, Vera Cruz, Gulf of Mexico, 

 Panama, Brazil ; in deep water. 



Subfamily II. Carcininae. 



Carcinina . . . . . . Miers. 



Cairiniens, Polybiens, \ , ,.., ^-j 1 



.A. Milne Edwards. 

 L issocarciniens) 



Carapace slightly, if at all, transverse, with the antero- 

 lateral margins arcuated, and armed with five or fewer 

 marginal teeth. Basal antennal joint moderately 

 developed. First pair of legs rather small. Fifth pair 

 formed for swimmine. 



Synopsis of the Genera. 



I. Antenna; not wholly excluded from the orbits. 



a. Fourth joint of first pair of legs without spines.- 

 {Portuuiis.) 



b. Fourth joint of first pair of legs with spines. - 

 {Platyoiiyckns.) 



