RECENT BRITISH OSTRACODA. 



371 



antennae and the second pair of jaws renders it impossible to retain it in the posit 

 which it at first occupied as a Candona. The same remark applies also to the follow 

 species, C. serrata. 



The species described by me in another place under the name Candona virescens, I n 

 believe to be the young of C. reptans. 



i 



15. Ctpris serrata (Norman). (Plate XXV. figs. 15-19, and Plate XXXVI. fig. :?.) 



Norman, Ann. & Mag 



i>; and Trans 



Tyneside Nat. Field Club, vol. v. p. 148, pi. hi. figs. 1-6. 



Valves subtriangular, oblong, broad and rather squared in front, narrow and oblique h 

 rounded behind. The ventral margin is nearly straight, the dorsal margin much elevated, 

 and gibbous at the anterior thud, sloping steeply towards each extremity. Anterior 



i 



broad and only slightly rounded at the angles, armed along the lower half of bo 

 valves with a row of from eight to ten spines. The posterior margin is, in like manner, 

 set with six or seven spines. Seen from above, the outline of the shell is oblong-oval, 

 widest in the middle and tapering to each extremity. End view tumid, broad and 

 rounded at the base, pyramidal at the apex. The colour of the shell is pale grey, 

 marked with a central patch of lighter hue and two large patches of deep brown, 

 which form a broad but interrupted zone round the central space. The depth, as well 

 as the disposition, of the colours, however, is subject to considerable 

 marked with impressed punctures, and beset with scattered hairs. Lucid spots seven, 

 oblong, arranged irregularly near the centre of the valve, with their long axes nearly 

 parallel with that of the shell. The most usual arrangement of the spots in this species, 

 as also iu C. reptans, is as follows :-a central row of three spots placed parol lei to each 

 other and transversely across the shell ; two spots slightly in advance and olten c 



the remaining two behind. A comparison of the figures (1 1. XXV. n 



Surface 



below 



2TS. 1 I 



& 10) will show that this arrangement differs only slightly from that of C. reptan 

 The second joint of the lower antenna bears a brush of five simple «-£"T^ 

 very short setae, springing from near its apex, and reaching not much beyond the 

 of the third joint, which also bears four or five similar seta, reaching «^^-J 

 the base of the terminal claws (Plate XXXVI. fig. 3). The postabdom nal rami an 

 their termiual seta, are Ion,, slender, and without serratures. The ^**£t 



an*, bears a small hooked claw and set*, just as in 



a 



this species and in C. rep 



Length - 2 \ in., height 



him at 



Hab, Cypris serrata was first dc 



Sedgefield. I have myself taken it 

 Mr. W. W. Stoddart for specimens 



abundant . 



f j Wlake, near Snnderiand; and ! an, „„.,bte„ » 



from Ashley Brook, Bristol, .here it -eems to be ven 



3e 2 



