68 STALK-EYED CRUSTACEA 



praeocular spine is well developed. The rostrum is 

 composed of two well-developed spines, which are not 

 deflexed and are divergent from their base. The front 

 is very large, and occupies twice as much space as the 

 base of the rostrum. The eyes are small. The orbits 

 are very deep ; they are directed outwards ; their upper 

 border does not project. The basal joint of external 

 antennae is larger at the distal end, where it terminates 

 in a broad transverse edge, than at its base, soldered to 

 the front at the sides of the rostrum ; it is armed with one 

 or two small distal spines or tubercles, not visible on a 

 dorsal view; the flagellum is sometimes concealed by 

 the rostral spines, sometimes laterally exposed at the 

 sides, but always very near the antennulary fossae, 

 and very far from the orbits. The fourth joint of the 

 external maxillipedes is distally truncated, with the 

 antero-external angle rounded or subacute. 



The first pair of legs, in the adult male, is well 

 dev^eloped ; palms elongated and subcylindrical or some- 

 what compressed, but not dilated or enlarged ; fingers 

 without any, or with but a small, intermarginal hiatus 

 at the base when closed. Walking legs moderately 

 elongated, with the joints subcylindrical, without spines ; 

 terminal joints nearly straight. 



Abdomen is seven-jointed. 



Range. — West Indian Sea, Brazil, the Cape; at 

 moderate depths. 



Synopsis of the Species. 



A. The upper surface of the carapace has no spines ; 

 the antero-lateral edge has five; one spine on postero- 

 lateral edge. — {P. corjiuta.) 



B. The upper surface of the carapace has many spines ; 



