282 
GAMMARIDiE. 
American species. The metacarpal joint is produced in- 
feriorly into a long free tooth-like process, reaching as far 
as the extremity of the wrist, which itself is very long. 
The hand is not half the length of the wrist, slender and 
slightly tapering. The finger is about the same length 
as the hand, and when closed reaches the extremity of 
the metacarpal process, with which it forms a complex 
claw. The second pair of gnathopoda are not more than 
half the length of the first, and are simply subchelate ; 
the hand being but slightly dilated, having the palm 
oblique and imperfectly defined. The next three pairs 
of legs are rather shorter than the second, but the sixth 
pair are about a third longer, and the seventh are one- 
fourth longer than the sixth. The last pair of caudal 
appendages do not reach beyond the extremity of the 
preceding. 
The colour of the animal is of a claret-red, with 
numerous small dark spots, chiefly on the coxae and 
dorsal surface of the tail. We have taken, from some 
trawl refuse, a specimen of a yellow colour, speckled 
with black spots of a larger size than those in the red 
specimens; and which also had the inner margin of the 
finger of the first pair of legs smooth, as shown at h in 
our figure. We have also observed a second specimen, 
in which the first pair of legs are shorter and more 
robust ; but these being the only differences, we think 
that they must be looked upon rather as varieties from 
the typical form than distinct species. The distinctions 
may indeed be those of sex, in combination with local or 
other causes, for as yet the female has not been dis- 
tinguished. 
An animal of this species long remained unnamed in 
the British Museum. Our specimens were first taken in 
Oxwich Bay, in Glamorgan, and subsequently we ob- 
