﻿NO. 13 NEW CRUSTACEANS FROM PANAMA RAT II BUN 3 



LEPTODIUS TABOGANUS, new species 



Carapace about y$ as long as wide, suboval ; anterior ^3 deeply 

 areolated and crossed by granulated rugae ; a well-marked straight, 

 transverse ridge runs across the branchial region in line with the 

 posterior border of the gastric region and just behind the transverse 

 ridge which runs inward from the tip of the last tooth of the lateral 

 margin. Front nearly transverse, composed of two lobes separated 

 by a V-shaped notch, each lobe very slightly concave and more 

 advanced at the inner than the outer angle. Of the five lateral teeth 

 (which include the angle of the orbit), the second and third are blunt, 

 the fourth subacute, the fifth acute ; the third tooth is very obtuse- 

 angled, the fourth a little more than a right angle, the fifth is acute- 

 angled and points directly outward. Lower margin of orbit very 

 prominent, its entire margin showing in dorsal view when the eye is 

 retracted. 



Outer surface of carpus and upper half of exposed surface of palm 

 of the unequal chelipeds coarsely granulate, the surface roughened 

 by irregular depressions and ridges. The black color of the im- 

 movable finger extends well up on the palm. Lower margin of larger 

 palm very convex ; about three teeth on each finger ; the most distal 

 tooth of the thumb of the larger chela is noticeably larger than the 

 other teeth; tips of fingers distinctly spooned. Legs fringed with 

 coarse hair. 



Dimensions. — Male, length of carapace, 12.6 mm. ; width, 20 mm. ; 

 fronto-orbital width, 12 mm. 



Type locality. — Taboga Island, Bay of Panama; May 11-15, 191 1 ; 

 3 males, 1 female. 



Type specimen. — Male, Cat. No. 43658, U. S. Nat. Mus. 



Allied to L. occidentalis Stimpson, 1 but carapace wider, fronto- 

 orbital width greater, lateral teeth extending further back and of 

 different shape, the dark color of the fingers runs further back on the 

 palm and the abdomen of the male is narrower, especially so in the 

 last two segments. 



1 Ann. Lye. Nat. Hist. New York, Vol. 10, 1871, p. 108. 



