306 ^GTD^. 



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. The 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 *' Regne 

 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. 



