Smith.] 286 [Februarys, 



the antero-lateral, one on tlie extremity of the median, and three ar- 

 ranged in a triangle behind it; the remaining ones M'hieh are smaller, 

 irregularly distributed over the branchial and posterior regions. 

 Front very strongly deflexed and four-lobed, the median lobes much 

 larger than the lateral, projecting almost perpendicularly downward, 

 separated by a deep, acutely triangular sinus, and their outer and an- 

 terior edges slightly denticulate; the lateral lobes projecting as slen- 

 der teeth. Superior margin of the orbit armed with three small 

 tubercles, of which the outer one forms the external angle. Antero- 

 lateral margin armed with three long, triangular teeth which are sep- 

 arated from the angle of the orbit by a broad shallow sinus, below 

 which, on the inferior region, there is a slender tubercle. Inferior 

 margin of the orbit broken by a deep sinus, the inner lobe prominent 

 and usually somewhat bituberculate at the tip, the outer lobe armed 

 along the margin with three or four small tubercles; external hiatus 

 well marked. Inferior orbital region with a few scattered granules. 

 An oblique line of eight or ten small tubercles on the sub-branchial 

 region terminating just behind the posterior tooth of the antero-lat- 

 eral margin. 



Chelipeds slightly unequal, carpus armed with a strong spine on the 

 inner edge and a few scattered tubercles on the upper surface, hand 

 tuberculose above and externally, the palm with a naked and smooth 

 space on the lower edge at the base of the finger, fingers smooth, 

 striate and dark brown, the color not spreading upon the palm. Am- 

 bulatory feet slender and ai'med with a few scattered sharp granules 

 on the upper side. 



Length of the carapax in a male from Panama, 11.4 mlllim. ; 

 breadth, 15.0; ratio, 1 : 1.31. Length of carapax in a female from the 

 same locality, 11.0 miUim. ; breadth, 14.5 mlllim.; ratio, 1:1.32. 

 Zorritos, Peru, and Panama; F. H. Bradley. ' 

 Trapezia formosa, sp. nov. » 



Carapax without lateral spines or teeth, very smooth and shining, 

 convex in two directions, very broad in the middle but much con- 

 tracted at the orbits; regions not at all defined; two puncta on the 

 posterior part of the gastric region, a scattered group of several on 

 each side in front of these and quite near the orbits, and an irreg- 

 ular sub-marginal line of small ones along the front. Front with a 

 slight groove along the margin above, the edge thin, slightly crenula- 

 ted, and somewhat six-lobcd, the median lobes narroAv but more 

 prominent than the others; outer angle of the orbit not at all promi- 



