142 LEUCOSIAD^. 



ridge on eacli side ; the surface is everywhere distinctly 

 granulated. The first pair of legs are the longest and are 

 equal ; the arm is trihedrons, the wrist short and slightly 

 inflated, the hand rounded, inflated, externally carinated, 

 the fingers furnished with two very minute ridges on the 

 outer surface ; the whole granulated. The remaining pairs 

 of feet are slender, the joints rounded, the terminal one 

 slightly curved. The whole of the parts ahout the mouth, 

 particularly the foot-jaws, distinctly granulated, the granu- 

 lation appearing almost like minute pearls. The ahdomen 

 in the male is triangular and more than twice as long as 

 it is broad ; the third to the sixth joints united, — in the 

 female it is much rounded, nearly as broad as it is long, 

 the terminal articulation abruptly much smaller than the 

 preceding, to which it Is, as it were, a mere appendage. 



Colour reddish brown, paler beneath, the abdomen in 

 either sex often symmetrically spotted with red. I have a 

 specimen obtained by Mr. McAndrew, and to whom I am 

 indebted for it, which is all over of a lovely bright rose 

 colour. 



This species, which is the largest of the genus, is about 

 five-eighths of an inch long, by two-thirds broad. These 

 are the dimensions of the carapace of a female specimen 

 in my cabinet from the coast of Devon ; and Dr. Leach 

 speaks of female specimens half as large again as his figure, 

 which would correspond with mine, or perhaps rather ex- 

 ceed it. It was first described by Pennant, from s])eci- 

 inens in the Portland Cabinet, which were probably ob- 

 tained at Weymouth, a locality in which another species, 

 E. Bryerii, was also first discovered. It was afterwards 

 found on the coast of Devonshire, from whence I have 

 obtained it, tlirough the kindness of my friend Walter 

 Buchanan, Esq., who procured it at Exmouth. It is men- 



