Kathbun — Neiv Fresh- Water Crabs from Colombia. 99 



Cincinnati Coffee Plantation, Santa Marta Mountains, Coloml)ia, 4500 

 feet elevation, by M. A. Carriker, July 10, 1913, Orig. No. 75. 



Measurements. — Holotype male, length of carapace on the median line 

 15.3 mm., width of carapace 26. (> mm., width between outer angles of 

 orbits 15.5 mm., width of front above, between the eyes, 8.3 mm., length 

 of larger propodus below 25.2 mm., greatest height of palm (near middle) 

 10.3 mm., greatest thickness of palm 7.3 mm., length of dactylus of 

 cheliped, 13 mm. Largest female, length IS, width 32 mm. 



Description — A small species. Carapace smooth to the eye, very iinely 

 granulate and furrowed, punctje visible without a lens ; cervical suture 

 straight and deep for the greater part of its length, but almost imper- 

 ceptible toward the middle of the carapace and toward the margin. 

 Lateral margins almost entire; a broad emargination just behind the 

 orbit, and a number of inconspicuous teeth behind the cervical suture. 

 Front without definite upper limit, the dorsal surface of the carapace 

 rounding gradually downward to the sinuous or quadrilobate lower 

 margin. Orbits nearly transverse, upper and lower margins subparallel. 



Orifice of efferent branchial channel completely rimmed but in a 

 difTerent way from P. pearsei. In clausa the outer end of the epistome is 

 produced laterally in a long spine, which meets an oblong prominence of 

 the jugal area. 



Merus of outer maxilliped with outer margin very oblique, and nearly 

 straight, with only a very shallow siims behind the articulation with the 

 carpus; ischium a little narrowed at distal end; exognath between ^ and 

 % as long as ischium. 



Chelipeds very unequal; merus very rough above, irregularly toothed 

 within; tooth of carpus short, subacute; fingers gaping; a tooth at the 

 extreme proximal end of the immovable finger gives a peculiar appear- 

 ance to the large chela. 



The sides of the male abdomen are as a whole somewhat convex after 

 the third segment although the margins of the segments are separately 

 concave. The appendages of the first segment viewed from the inside are 

 slightly constricted behind the extremity, which is oblique and arcuate 

 and produced at either end ; an upward-pointing tooth projects from the 

 distal surface. 



Relationships. — In my key (op. cit. ) this species would fall under a, 

 b, c\ 



Variations. — The front is not always distinctly four-lobed, as the 

 median emargination is at times so slight as to be almost imperceptible. 



Record of specimens. — Cineinnati Coff'ee Plantation, Santa Marta Moun- 

 tains, Colombia, 4500 feet, under logs, F. M. Gaige, July 2, 1913, 1 c? 

 1 9 1 juv., Orig. No. 8, Cat. No. 45,879. In forest south of Cincinnati 

 Coff'ee Plantation, 4200 feet, A. S. Pearse, July 2, 1913, 19 6 juv. (first 

 free stage), Orig. No. 14, Cat. No. 45,874. Cincinnati Coffee Plantation, 

 4100 feet, under stones near creek, A. S. Pearse, July 3, 1913, 1 <5^ 6 

 juv., Orig. No. 19, Cat. No. 45,877. Cincinnati Coffee Plantation, 4800 

 feet, walking over ground during rain, F. M. Gaige, July 3, 1913, 1 c? 



