STOMAPODA. 
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of upper antennae very large and excavated above, so that 
the eyes can lodge in the cavity; carapace with a crest 
down the middle, and a groove on each side of this crest. 
First, second, and third pairs of legs two-toed ; the wrist 
of fourth and fifth. pairs of legs not ringed. The false 
abdominal legs terminating in two ciliated plates. The tail- 
fin long, its middle plate triangular and grooved beneath 
down the middle. 
Penteus Caramote, Risso, sp. Davies’ Grooved Shrimp. 
— Beak shorter than the peduncle of upper antennae, with 
twelve teeth on its upper edge, and beneath with one. 
There are three grooves on carapace, one on each side of 
beak, and a third shorter one separating the two grooves on 
the posterior part of carapace. 
British coast, very rare, taken on the coast of Anglesea 
by the Rev. H. Davies. It is a common species in the 
Mediterranean, where it attains the length of seven inches. 
Order II. STOMAPODA, Latr . 
In the species of this curious order, the branchiae are 
always external, and not lodged, as in the preceding order, 
in inner chambers of the carapace. These gills, instead of 
