MUSEUM OF COMPARATIVE ZOOLOGY. 143 



It was taken in from 5 to 7 fathoms between East and Middle Keys, 

 Tortugas, and East of the Tortugas in 13 fathoms. 



Pilumnus nudifrons nov. sp. 



Body and feet everywhere pubescent above, except on the frontal and 

 orbital regions. Carapax about seven eighths as long as broad, much 

 narrowed posteriorly, convex ; regions slightly denned and not protuber- 

 ant ; surface beneath the pubescence punctate and sparsely roughened 

 with scattered tubercles variable in size, and most numerous on the gastric 

 and hepatic regions. Frontal and orbital regions continuous, without any 

 teeth or spines, forming a prominent, wide, naked, minutely granulated 

 anterior border to the carapax, made more distinct by a channel-like 

 depression which separates it from the rest of the surface. On this 

 border there are no sinuses at the junction of the front and orbits, and 

 the median emargination of the straight or slightly convex frontal outline 

 is very slight. At the oute.r angle of the orbit the border is continued for 

 a short distance posteriorly, on the antero-lateral margin. Beyond this 

 the antero-lateral margin is nearly parallel to the axis of the body, and 

 armed with three small triangular teeth. Orbital margin below entire, 

 and smooth, without fissures or teeth, with the exception of the usual 

 large tooth forming the inner angle. The subhepatic tooth is distinct, 

 forming part of an irregularly denticulated or granulated ridge, which 

 extends from the posterior extremity of the anterior border of the cara- 

 pax to the anterior angle of the buccal area. The basal joint of the 

 external antennae is small, and the space between it and the frontal pro- 

 jection is almost equal to its own length. Cbelipeds very short and stout, 

 armed above and on the outer side with roughened tubercles like those 

 of the carapax. On the superior margin of the hand there are three 

 strongly projecting teeth. 



Dimensions of a female specimen : Length of the carapax, 0.41 ; 

 breadth, 0.49 inch; proportion, 1 : 1.195. 



Only two specimens of this species were taken, both females. They 

 occurred at the depths of 111 and 125 fathoms, off Sombrero Key. 



Pilumnus granulimanus nov. sp. 



This is a small species, in which the carapax is rather short and broad, 

 naked, areolated and granulated in front, and smooth posteriorly. The 

 granulation is especially conspicuous on the hepatic regions. Antero- 

 lateral margin minutely denticulated, and armed with four small, equal, 

 acute, triangular teeth, besides the angle of the orbit. At the penult 

 tooth a short granulated ridge extends inwards on the surface of the 



