136 TANAIDA. 
surface of every denticle. The second pair of gna- 
thopoda are but half the length of the first, being 
slender, very feeble, and terminating in a slightly curved 
styliform dactylos. The first two pairs of pereiopoda are 
formed nearly like the second pair of gnathopoda, but 
have shorter, therefore stronger, dactyla. The three 
posterior pairs of pereiopoda are reversed from the 
preceding in their mode of attachment, and have the 
basal joint more robust than that of the preceding pairs 
of pereiopoda; in other respects they resemble them in 
form. ‘The five anterior pairs of pleopoda are alike in 
size and shape; they consist of a stout peduncle on each 
side, and carry a pair of oval, membranous plates, 
ciliated with long and strong hairs upon the outer and 
inferior margins. The inner plate, if we may judge 
from observation after death, is carried at right angles 
with the outer, which rests pendant in the water. The 
posterior or caudal pair of pleopoda consist of a single 
multiarticulate branch, of which the basal joint is larger 
than the terminal ones: it consists of nine or ten small 
articuli. 
We are indebted for this interesting addition to our 
British Fauna to the zeal and research of the Rev. 
A. M. Norman, who took it during the summer of 1865 
among Zostere between tide marks in Belgrave Bay, 
Guernsey. 
The distinction between this and Dana’s Feejeean 
species exists in the latter having longer superior an- 
tenne, as also more slender and longer gnathopoda, 
which are only armed with a small rudimentary tooth on 
the inner surface near the extremity of the fixed finger 
of the great claw; the posterior pair of pleopoda are 
also longer, being described by the author as equal to 
the pleon in length. 
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