178 
GAMMARIDiE. 
similarly formed to that of K. arenaria , but the carpal 
process is not quite so long, and ends in an upturned 
point ; the digital process of the hand is also curved at 
the apex, and terminates in two small dental processes; 
the finger is long, slightly curved, and the apex reaches 
as far as the extremity of the carpal process, against 
which it appears to be able to impinge. The next two 
pairs of legs resemble each other, differing from those of 
K. arenaria only in being furnished with more hairs, 
which extend on both margins to a considerable extent. 
The fifth pair of legs are wanting in our single speci- 
men, but we suppose them to resemble the seventh pair, 
and if so, the metacarpus is not quite so largely lobed as 
in K. arenaria . The seventh pair of legs have lost the 
distal joints, but those that remain indicate parts of a 
long limb. The caudal appendages have not been closely 
examined, but they appear to correspond very nearly with 
those of K. arenaria . 
It is. only after much deliberation that we have de- 
termined to embrace this monocular form in the same 
genus with a binocular species. The very close resem- 
blance in the general detail of the two animals induces 
us to consider that the variation in the organs of vision 
may be sexual, or dependent upon certain altered physical 
conditions. We have little doubt but that, like its near 
ally K . arenaria , this species is a burrower ; but whilst 
the habitat of the former is on the sea-beach, where the 
light is strong, that of the latter is under a pressure of 
from seventy to ninety fathoms of water, where the light 
can scarcely penetrate, even should the creature not 
plough its way beneath the soil. 
The specimen from which this description and figure 
are taken is in the collection of the Rev. A. M. Norman, 
who dredged it sixty miles east of Shetland. 
