2IO STALK-EYED CRUSTACEA 



7. Pseudothelphusa reflexifrons. 



PseudothelpJmsa irflcxif/viis . . Ortinann, 



Carapace very convex longitudinally. 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 exognath 

 not reaching distal third of the third joint. Lateral 

 margins of fourth to sixth segments of abdomen of 

 male arcuate. 



Range, — West Indies, Upper Amazon. 



The following American species have been described 

 by Miss M. J. Rathbun :— 



I. Front without a superior margin or marginal line : — 



I. Pseudothelphusa macropa. 



Pseudothelphusa macropa . A. Milne Edwards. 

 Boscia macropa . . . . H. Milne Edwards. 



The outer margin of fourth joint of external maxilli- 

 pedes straight or concave, forming an angle with the 

 anterior margin. The spines on terminal joint of the 

 walking legs are small and numerous, being fifteen or 

 more in a row. 



Bolivia, United States of Colombia. 



2. Pseudothelphusa ecuadorensis. 



The outer margin of fourth joint of external maxilli- 

 pedes straight or concave, forming an angle with the 

 anterior margin. The walking legs are very slender, with 



