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HISTORY OF BRITISH CRUSTACEA. 
and of almost equal size throughout ; process of third seg- 
ment very prominent. Colour brown, with a reddish tinge 
in many places. 
Found by Mr. Thompson in Weymouth Bay. 
Hippolyte Mitchelli, Thompson. — Beak straight, acu- 
minate, without a spine on the upper portion ; beneath, with 
a three-toothed keel and a small tooth near the tip. Of a 
beautiful, clear, dark green. Length sixteen lines. 
Found by Mr, Thompson in Weymouth Bay, in from 
four to six fathoms water. The Bev. Alfred Norman, in 
his MS. notes on the British Species, remarks: “ I have met 
with two liipjoolytes at Falmouth, in rock-pools at low 
water, which seem to answer to the description of those 
which Mr. Thompson of Weymouth has named Mitchelli. 
The rostrum is toothless above; one specimen has two 
teeth, and one at the apex below ; the other has three 
teeth, and one at the apex. Although however my speci- 
mens have no tooth at the base above, yet in the place 
where I have invariably found the basal tooth in various , 
there may be seen a slight rising in the rostrum. I con- 
sider my specimens to be a variety of various . At the 
same time, I have never, except in one of these two 
instances, found a specimen of various with four teetll 
