214 BRITISH ENTOMOSTRACA. 



broad, flat body, rounded at one side, and furnished with 

 several rather long, finely-serrated setae. 



The specimens of this species, which I have now referred 

 to the Cyclops chelifer of M filler, differ in so many points 

 from his figures and description, that in a paper upon the 

 Berwickshire Entomostraca, read before the Berwick. Nat. 

 Club, and since that published in their ' Transactions,' 

 1 was induced to make a distinct species of it, and named 

 it Ct/clojJS Johnstoni. Upon more minute examination, 

 however, I have become satisfied that, notwithstanding 

 these discrepancies, it approaches sufficiently near the 

 C. clit'lifcr to be identified with it. In describing this 

 species, Miiller says there are no articulations in the body, 

 but that in form it is " farciminis facie." He figures, 

 too, only three articulations to the antennae. These charac- 

 ters are so much at variance with the analogous portions 

 of the body in all the other species of this family, that, as 

 he mentions it as of rare occurrence, it is most probable 

 he must have made some mistake with regard to them. 

 Some differences also exist in his description of the first 

 pair effect, and the length of the caudal setae ; but they 

 agree so well in the characteristic foot-jaws, in the beaked 

 head, and in the general form of the animal, that I have 

 now no hesitation in referring it to the Cyclops clidifcr of 

 Miiller. 



Hal). Sea-shore of Berwickshire, Cockburnspath, Ber- 

 wick Bay, &c. ; common. Dover, North Foreland, Sep- 

 tember 1849. 



2. ARPACTICUS NOBILIS. Tab. XXVIII, figs. 2, 2 a-e. 



ARPACTICUS NOIULIS, />,//,->/, Trans. Bcnv. Nat. Club, ii, 155, 1815; 



Ann. and Mai;. Nat. Hist., xvii, 410, t. 9, 

 f. 5, 5 ft, b, c, il. 



The thoracic and abdominal portions of the body are 



* Tiloius describes his C. armnhix as liavint: Ilir articulations of tin- body 

 vcr\ iinlMiiirl, ami uses the .same cxpi rssi,,n, "faiviniinis facie;." lit; alludes 

 to tl\c <'. flulif'-r of Miillcr Jis being a fresh-water species! 



