RECENT BRITISH OSTRACODA. 



365 



however, I again met with it in the lakes at E-othley and at Belsay in Northumberland; 

 Mr. B/obertson has more recently taken it at Cumbrae ; and it also occurs abundantly in 

 a gathering taken by my brother, Mr. Alfred Brady, in a pond on Wandsworth Common. 



In many respects this handsome species agrees with C. virens, but it is sufhciently 

 distinct. The oblique end view (fig. 36) is especially characteristic. The shell is also 

 much more strongly punctate than that of C. virens, the colour deeper, the setse of the 

 abdominal rami more crowded. The Westmoreland specimens are light olivaceous 

 brown, those from Northumberland and Cumbrae are deep green ; the Wandsworth 

 specimens are more variable, and present an intermediate appearance. The figure and 

 description of C. elUptica given in the ' Natural History of British Entomostraca ' 

 would apply tolerably well to the present species ; but Dr. Baird has kindly compared 

 one of my specimens of C. ohliqua with those of C. elliptica preserved in the British 

 Museum, and considers the two to be distinct. 



5, Ctpeis elliptica, Baird. 



Cypris elliptica, Baird, Trans. Berw. Nat. Club, ii. p. 152, 1846 ; Brit. Entom. p. 158, tab. xix. fig. 12. 



" Shell nearly elliptical, of a light green colour, clouded with darker patches of the 

 same colour on the sides of the shell. Valves glabrous, except round the edges, which 

 are beset with long hairs. Filaments of inferior antennee long. Pond at Highgate, 

 July 1846." 



I do not know this species, except from Dr. Baird's description quoted above. 



6. Cypris punctillata, Norman. (Plate XXVI. figs. 1-7, and Plate XXXVI. fig. 11.) 



Cypris cuneata, Baird, Proc. Zool. Soc. Lond. 1850, p. 255, pi. xviii. (Annulosa) figs. 22-24. 



punctillata, Norman, Ann. & Mag. Nat. Hist. Jan. 1862, p. 43, pi. ii. figs. 11-14; and Trans. 



Tyneside Nat. Field Club, vol. v. p. 145, pi. iii. figs. 11-14. 



Valves oblong, subovate, tumid. The anterior border is broad, well rounded, and 

 armed on both valves with a series of eight sharp teeth ; the posterior narrowed, rounded, 

 and bears near the ventral angle of the right valve four or five spines, the lowest of 

 which is much longer than the rest. Dorsal margin boldly arched, highest at its anterior 

 third; ventral margin nearly straight, with a slight sinuation. Seen from above, the 

 carapace is broadly ovate, pointed in front and rounded behind, the greatest breadth in 

 the middle. The ventral aspect is marked by a conspicuous central fossa or sulcus 

 formed by the depressed margins of the two valves. End view subpyramidal or cuneate, 

 the height and width equal. Internally the front and hinder margins of the valves are 

 produced into broad lamellar plates. Lucid spots about seven, oval, crowded, and placed 

 obliquely near the centre of the valves. The surface is thickly beset with long hairs and 

 marked by rather large closely set round pittings (fig. 6). Colour deep green. 



Length y^- in., height ^ in. ; . "r .^-v^v y: | . 04- v,-... 



Eirst found at Duddingston Loch, Edinburgh, by Dr. Baird, and more recently by the 

 Bev. A. M. Norman at Sedgefield, Durham. 



This fine species was originally described by Dr. Baird from immature specimens, the 

 name cuneata being meant to designate the lateral aspect of the shell. In the adult, 



