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HISTOllY OF BRITISH CHUSTACEA. 
Gen. 161 . CANTHOCAMPTU S, Westw. 
Foot-jaws small, simple ; antennules simple ; ovary single. 
Canthocamptus minutus, Muller, sp. — Thorax and abdo- 
men not distinctly separated from each other, composed of 
ten segments, gradually diminishing in size as they descend. 
The animal frequently turns up the posterior part of the 
body over the other, like the species of Stapliylinida, 
Hab. Ponds and ditches of fresh-water. 
Canthocamptus Stromii, Baird. — Thorax and abdomen 
of ten segments, gradually tapering to the end ; antennae of 
eight short joints. 
Hab. Sea-shore at Cockburnspath, and at Dover. 
Canthocamptus furcatus, Baird. — Thorax and abdo- 
men very distinctly separated, composed of ten segments, 
the first the largest, the last ending in two short lobes, 
from which proceed four setae, two much longer than the 
others. 
Hab. Sea-coast, Berwickshire; Kent; Dorset. 
Canthocamptus minuticornis, Muller, sp. — Thorax of 
four segments, each terminating at the back in a sharp 
spine ; abdomen of five segments, last one bilobed, with a 
stout seta half the length of animal. 
