306 AGID A. 
the outside and serrated on the inside. The fourth 
pair of legs are intermediate in size, between the three 
fore and three hind pairs, which latter are slender ; 
all the legs are terminated by a small hook-like finger, 
which appears to be articulated at its tip in the hind 
legs. 
The terminal segment of the tail is obconical, with 
the sides slightly curved and the extremity rather 
rounded. ‘ihe anterior pair of pleopoda are strong, and 
form an operculum, of which the basal joint is large and 
oblong, and the two terminal divisions unequal, the 
inner one being the larger, with its inner edge straight, 
whilst the outer one is more ovate; the lateral appen- 
dages are also unequal, the inner lobe being the larger 
and ovate, with its apex acute, the outer margin beyond 
the middle somewhat notched and spinose. 
It will be seen by a comparison of our description and 
figures of the parts of the mouth with those of the genus 
Cirolana, given in the Crochard edition of the ‘‘ Régne 
Animal,” that this animal is closely allied to the last- 
named genus, and that it has no other relation with 
Anthura than its narrow cylindrical form. 
The species was first obtained by Colonel Montagu on 
the coast of Devonshire ; we have procured it by dredging 
in the Sound, and in six fathoms near the Knap Buoy, and 
from trawlers off Plymouth, and have received it from 
Mr. Loughrin from Polperro, and from the Frith of 
Clyde, taken by the Rev. A. M. Norman. Dr. Lukis, of 
Guernsey, took upwards of a dozen specimens feeding 
together within the orbit of the eye of a whiting, the eye- 
ball of the fish being nearly detached from the surround- 
ing parts. The fish did not seem to be out of condition, 
although the parasites must have been there some time, 
as they were remarkably blanched. 
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