AX I US STIIIYNCHUS, 229 



appendages are broad, rounded, and ciliated at the mar- 

 gin. The first pair of legs are unequal, robust ; the arm 

 thicker anteriorly, twice as long as it is broad ; the wrist 

 broader than Jong, somewhat triangular ; the hand thick, 

 with nearly parallel sides; the fingers short and strong, cili- 

 ated with a few stiff hairs. The second pair of feet di- 

 dactyle, rather small, compressed ; the arm as long as the 

 wrist and hand ; the fingers weak ; the whole, particularly 

 the arm, furnished with long hairs at the inner margin. 

 Of the remaining feet, which are all simple, the third pair 

 are the thickest, and the fifth the most slender. 



The following observations of the two sexes of this 

 species are from Couches u Cornish Fauna :" " The male 

 of what I judge to be the same species differs from the 

 female in the snout, which, in my specimen of the latter, 

 was finely notched, and without the well-marked longitudinal 

 ridge of the former. The outer antennae of the male are fur- 

 nished with a ridge of firm hair on their inward line, de- 

 creasing towards the point, which the female is without ; 

 and the former also has well-marked brushes near the 

 lateral edges of the abdominal rings. 1 ' 1 



Total length, three inches three lines. 



General colour, pale reddish-brown. 



This species, the largest of the family indigenous to this 

 country, was first discovered by Dr. Leach " at Sidmouth, 

 where it was taken amongst prawns on the shore. Mon- 

 tagu afterwards procured, near Plymouth, another speci- 

 men."" I have received it from Cornwall, through the 

 kindness of Mr. Couch, who is the only naturalist that 

 has hitherto given any account of its habits. 



" This species," says Mr. Couch, " like those of the 

 genus Callianassa, has the habit of burrowing in the sand, 

 from which it rarely emerges, and then it seeks shelter in 



