494 
COROPHIIDiE. 
Asia cus linearis. 
Pennant, Brit. Zool. Edit. 1777, iv. p. 17. pi. 
Onicus volutator. 
Cancer grossipes. 
xvi. fig. 31. 
Pallas, Spec. Zool. ix. p. 59. tab. iv. fig. 9. 
LiNNiEUS, Syst. Nat. ii. p. 1055. 
This species has the eyes small and round. The 
superior antennae are about one-fourth of the length of the 
animal ; the first joint of the peduncle has the inner 
margin crenulated. The inferior antennae are very 
powerful, and in the male are longer than the animal 
itself; the penultimate joint of the peduncle being 
armed upon the inferior distal extremity with a strong 
tooth, which appears to assist considerably in holding 
any object when the extremity of the antennae is folded 
upon itself; this organ appearing to possess the strongest 
prehensile power, and being no doubt used as a weapon 
of offence in its battles with other animals in its struggle 
for existence. The first pair of legs are not powerful 
organs, being simply subchelate. The second pair have 
the wrist as long as the hand, inferiorly dilated, and 
furnished with one or two longitudinal rows of long 
hairs ; the hand is not so wide as the wrist, and is 
furnished near the carpal articulation with a diagonal 
row of long hairs ; the finger is narrower than the hand, 
and is short, sharp, and slightly curved. The first two 
pairs of walking legs are moderately long, and terminate 
in long, straight fingers ; the next two are short, and the 
last is nearly as long again as the two immediately pre- 
ceding. The natatory appendages have the basal joints 
very short and broadly developed. The caudal ap- 
pendages are also short, the last scarcely reaching beyond 
the extremity of the telson. 
The colour of the animal is grey, mottled with black 
stellated markings, appearing to assimilate very nearly 
to the colour of the soil which it inhabits. It dwells in 
