STALK-EYED CRUSTACEA 219 



than the buccal cavity, with exognath at least one-third 

 the length of the third joint. 



Nicaragua, Costa Rica, United States of Colombia. 



30. Pseudothelphusa colombiana. 



Carapace flattened or slightly convex longitudinally, 

 very wide, more than one and two-third times as wide 

 as long ; without lateral teeth. 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 exognath 

 at least one-third the length of the third joint. 



United States of Colombia, Mexico. 



31. Pseudothelphusa pittieri. 



A small species, less than 30 mm. wide. Carapace 

 flattened or slightly convex longitudinally, less than one 

 and two-third times as wide as long, finely granulate. 

 Cervical suture curved. Superior margin of front keeled, 

 with lower margin tuberculate. No tubercle 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. 



Costa Rica. 



32. Pseudothelphusa henrici. 



PseudothelpJntsa henrici . . . Nobili. 



A large species, more than 70 mm. wide. Carapace 

 flattened or slightly convex longitudinally, less than one 

 and two-third times as wide as long, finely granulate. 

 Cervical suture curved. Superior margin of front keeled. 



