1869.1 287 fgmith. 



nent ; sides very convex, the edge obtusely rounded, and, in the 

 younger specimens, a very slight rounded projection on the anterior 

 margin of the branchial region, which is entirely wanting in the larger 

 specimens. 



Chelipeds slightly unequal, smooth and glabrous, with a very few 

 scattered puncta on the upper side ; meros rather short; the anterior 

 edge armed with about six small teeth; carpus with a slight, obtuse 

 and rounded projection on the inner margin; hand stout but not swol- 

 len, the fingers short, considerably incurved, with a few sharp teeth 

 within, not gaping but the pointed tips somewhat hooked by one an- 

 other. Ambulatory feet slender, and glabrous to the tarsi. 



Color of alcoholic specimens uniform orange, a little darker above 

 than below; the fingers brownish. 



A number of specimens give the following measurements: — 



Length of 

 carapax. 



Breadth of 

 carapax. 



Ratio. 



Breadth at outer 

 angles of orbits. 



Breadtli of front 

 between orbits. 



5-6 mm. 



6-8 mm. 



1:1-21 



6-2 mm. 



3-6 mm. 



7-4 " 



9-2 " 



1:1-24 



8-1 " 



4-6 " 



7-6 " 



9-6 " 



1:1-26 



8-4 " 



5-0 '• 



6-9 " 



8-4 " 



1:1-22 



7-4 " 



4-0 li 



" 8-9 " 11-8 " 1:1-31 9-5 " 5-6 " 



Pearl Islands, Bay of Panama, among Pocillipora capitata Verrill; 

 F. EL Bradley. 



This species is easily distinguished from the next by the carapax 

 being much broader in proportion, much narrowed in front, the outer 

 angles of the orbits short and rounded, the sides arcuate and without 

 a marginal tooth on the anterior lobe of the branchial region. 



? Trapezia cymodoee Guerin, Dana, U. S. Expl. Expd., Crust., 

 p. 257, pi. 15, fig. 5. 



This species, or one so closely allied that the published descriptions 

 and figures do not enable me to distinguish it, was collected by Mr. 

 Bradley with the last species, and in much greater abundance. 



Carapax smooth and glabrous, broad, slightly convex, and in 

 younger specimens quite as broad at the outer angles of the orbits as 

 between the lateral teeth, but in large specimens, and especially fe- 

 males, it is slightly contracted in front; the puncta arranged much as 

 in the last species but less marked and regular on the front. Front 

 distinctly six-lobed, without a groove along the upper margin, the 

 edge thin, and in some specimens very slightly crenulate; external 

 angle of the orbit rather prominent and in young specimens acute 



