aS*. I. Smith on Brazilian Crustacea. 



25 



sides tliickly set with short spinulcs and slightly hairy ; the fingers 

 are slender, cylindrical and thickly covered witli a woolly pubescence. 

 The lamelliforni appendages of the penultimate segment of the abdo- 

 men are broadly rounded at their tips, and the outer ones are scarcely 

 longer than the inner. The terminal segment of the abdomen is nar- 

 rower than in P. Jauiaicensis, the sides are straight, and the tip has 

 a strong median tooth and a slender spine each side. 



The young males are quite similar to the full-grown, but the car- 

 apax is nearly smooth, the rostrum somewhat upturned at the ex- 

 tremity, and the legs of the second pair are smaller in proportion, and 

 the spines and spinviles less developed. 



The females differ remarkably from the males, all the specimens 

 being considerably smaller, and resembling the young males. The 

 carapax is much more gibbous and quite smooth, even in the largest 

 specimens. The rostrum in front of the eyes curves upward con- 

 siderably, and much more strongly in the small than in the large 

 sj^ecimens. The legs of the second pair are quite slender, much 

 shorter than in the male, only slightly spinulose in the large speci- 

 mens, and almost wholly smooth and naked in the smallest. Of the 

 ten specimens in the collection every one has large masses of eggs 

 imder the alidomen. 



Five specimens given the following measurements : — 



