Prof. T. Rupert Jones— Wealden Ostracoda. 5390 
been hitherto so distinctly indicated as might be, it is thought 
advisable to give some notes on, and a résumé of, this interesting 
series of fossil species. 
1. Cypris CoRNIGERA, sp. nov. Figs. la-If, p. 536. 
Valves suboblong; straight on the dorsal; elliptically rounded on 
the ventral margin; unequally rounded at the ends. Bearing a 
delicate sharp spine, or straight horn, at the front end of the dorsal 
line, pointing obliquely upwards (outwards and forwards). The 
extremities of the valves differ much in individuals, according to 
the state of preservation, and possibly according to sex. The front 
end is highest (broadest), and often boldly rounded, but sometimes 
showing a slight outward and downward slope at its upper part, 
just in front of the horn. The horn is, or has been, present on 
examples of both right and left valves, but it has very often been 
lost, and we have not been able to see it in place in a closed carapace. 
The highest end, that which bears the spine, is also the most 
compressed (Fig. 1f); and therefore in all probability is the anterior ; 
and hence the larger valve, overlapping the other ventrally, is the 
left (Fig. le). 
The anterior and posterior margins of the valves are slightly 
bevelled on the inside. The hinge-line is simple. The surface is 
smooth; but, readily dissolving away, both inside and out, into 
numerous little pits with rounded mouths, according to some 
structural peculiarity, the valves appear to be coarsely and irre- 
gularly punctate in many instances. 
This species occurs in two specimens of dark-grey shale, marked 
No. 8685 and No. 8688 (Geological Survey), from Atherfield Point, 
Isle of Wight. In the latter piece of shale it was associated with 
Metacypris Fittoni and a Fish-bone. 
2. Canpona ManrTeELui, sp. nov. Figs. 2a, 26, p. 536. 
In a light-grey compact shale (No. 3791, Geological Survey), 
from the Wealden beds between Atherfield Point and Shepherd’s 
Chine, there are on the bed-planes many Ostracoda belonging to 
Metacypris Fittoni (Mantell), small; Cypridea spinigera (Sow.), 
young individuals; Cypridea tuberculata (Sow.) ; Cypridea Valdensis 
(Fitton) ; and Candona Mantelli, sp. nov. 
The last somewhat resembles Candona candida’ (Miiller), and is 
evidently allied both to that species and to C. Phillipsiana, Jones 
(Grou. Mac. 1878, p. 108, PI. III. Fig. 3), but the latter is too large, 
and much too high and less symmetrical. In the form before us the 
posterior extremity is more evenly rounded than in C. candida, 
and the anterior is not so high. Of the new species the right valve 
figured in outline (Fig. 2a) is the largest and best preserved of the 
many specimens on the shale. 
Subreniform, broader (that is, higher), and more boldly curved 
behind than in front; elliptically arched on the back, slightly 
sinuous on the ventral margin. Surface smooth and very delicately 
1 See Gzou, Mac. 1878, p. 108, footnote. 
