142 BULLETIN OF THE 



Dimensions of a female specimen : Length of carapax, 0.22 ; breadth, 

 0.30 inch; proportion, 1 : 1.36. 

 Found at the Tortugas. 



Pilumnus lacteus nov. sp. 



Closely allied to P. gemmatus Stm. (Notes on North American Crus- 

 tacea, p. 86), and like that species covered with a whitish or cream-colored, 

 velvet-like pubescence. It diners in the more spiniform shape of the 

 antero-lateral teeth of the carapax, in the less numerous tubercles on the 

 carapax and chelipeds, in the want of tubercles on the superior margin of 

 the orbit, and in the smooth, glabrous outer surface of the hands, which is 

 light red in color. The lobes of the front also are more triangular and 

 pointed. 



Dimensions of a male: Length of carapax, 0.31 ; breadth, 0.44 inch ; 

 proportion, 1 : 1.42. 



Found on the reef at Cruz del Padre, Cuba, and at Key "West in from 

 2 to 5 fathoms. 



Pilumnus Agassizii nov. sp. 



Carapax convex, and with the anterior two thirds deeply areolated; 

 areolets protuberant. Surface pubescent everywhere, except on the 

 anterior and antero-lateral areolets, which are naked and thickly granu- 

 lated. The depressions between the protuberant areolets are broad, 

 occupying fully as much space as the areolets themselves. Two of the 

 areolets form the lobes of the front, which are as large and prominent as 

 the epigastric lobes, or even larger. The frontal surface is vertical, and 

 not much projecting, but the lobes are deeply separated from each other 

 and from the orbits. Orbital region protuberant and granulated ; margin 

 not toothed, but crenulated with granules, and marked by two fissures 

 above and two less conspicuous ones below. The anterolateral margin 

 behind the orbit is armed with three triangular, acute, equal teeth of mod- 

 t erate mzc. Subhepatic tooth distinct. Chelipeds stout, short, and thick ; 

 carpus covered above with granulated tubercles which are confluent ex- 

 teriorly, forming transverse ridges ; hand covered above and on the outer 

 side with small but prominent mammillary tubercles, having their apices 

 pointing forwards. Ambulatory feet pubescent and hairy ; penult and 

 antepenult joints armed with minute spines above. 



Dimensions of a male: Length of carapax, 0.C5 ; breadth, 0.83 inch; 

 proportion, 1 : 1.28. 



This species has some little resemblance to P. gemmatus, but the pro- 

 tuberances of the carapax are densely granulated instead of sparsely 

 tuberculated. 



