PILUMNUS HIRTELLUS. 69 



ably strong, thick, and rounded ; they are somewhat un- 

 equal, in some the right, in others the left being the larger; 

 the wrist is tuberculated, and furnished with a single spine, 

 and is slightly hairy ; the smaller hand is tuberculated on 

 its upper and outer surface, the larger one almost entirely 

 smooth ; the moveable finger much curved, the fixed one 

 triangular, and strongly toothed. The remaining legs are 

 slightly rounded above, flattened beneath ; they are covered 

 with numerous hairs, and there are also a few on the wrist 

 and on the anterior part of the carapace, which is also 

 covered with short down. The abdomen in the male is 

 broadest at the proximal margin of the third joint, thence 

 diminishing regularly to the extremity, the third to the 

 seventh, thus forming a long acute triangle. The abdomen 

 of the female is of the form of a long ellipse, with the 

 proximal portion truncate ; its margin is fringed with long- 

 hair. The colour of most individuals is brownish red, with 

 obscure yellowish spots ; the anterior legs brownish red, 

 the fingers light brown ; the remaining legs red, with ob- 

 scure yellowish bands. Tn many the brownish red colour 

 is replaced by a dull purple. 



In. Lines. 

 Length of the carapace . . . . . .07 



Breadth of do, . . . . . 10 



The present species is the only one of the genus found on 

 our coast, and it may be readily distinguished from all the 

 foreign species by the absence of spines on the superior 

 margin of the orbit. The figures in Dr. Leach's great 

 work are very inferior, and would scarcely serve to dis- 

 tino'uish it, were any of the other species indigenous to this 

 country with which it might be compared. They must 

 have been taken from immature specimens ; but even of 

 such they form but very erroneous representations. 



