220 STALK-EYED CRUSTACEA 



with lower margin not tuberculate. No tubercles on 

 outer surface of hand at base of fingers. External 

 maxillipedes only a little wider than the buccal cavity, 

 with exognath at least one-third the length of the third 

 joint. 



Ecuador. 



33. Pseudothelphusa peruviana. 



Carapace flattened or slightly convex longitudinally, 

 less than one and two-third times as wide as long, 

 coarsely granulate. Cervical suture curved. Superior 

 margin of front keeled. No tubercle on outer surface of 

 hand at base of fingers. External maxillipedes only a 

 little wider than the buccal cavity, with the fourth joint 

 narrow, subtriangulate, and its outer margin straight or 

 nearly so, and with the exognath at least one-third the 

 length of the third joint. 



Peru. 



34. Pseudothelphusa bocourti. 



Boscia bocourti ... A. Milne Edwards. 



Carapace flattened or slightly convex longitudinally ; 

 less than one and two-third times as wide as long, 

 coarsely granulate. Cervical suture curved. Superior 

 margin of front keeled. No tubercle on outer surface of 

 hand at base of fingers. External maxillipedes only a 

 little wider than the buccal cavity, with the fourth joint 

 broad, subquadrilateral ; outer margin arcuate to the 

 distal extremity, and with the exognatii at least one-third 

 the length of the third joint. The sixth and seventh 

 segment of the male abdomen of equal length ; appen- 



