62 Mr. G.S. Brady on Cyprideis torosa. 
small grassy pond near Sedgefield, by the Rev.A.M. Norman, in 
company with C.lucens, Cypris tristriata, C. affinis, C. ovum, &c. 
With reference to his specimens, Mr. Norman remarks: “ This 
species approaches very near to C. lactea (Baird), but is wider in 
proportion to its length, is not so ventricose, and wants the con- 
spicuous encircling fillet of that species. The surface in C. 
albicans is excavated with very numerous, small, shallow pits ; 
but in C. lactea it is only sparingly and finely punctate.” 
Subgenus Cypripets, Jones. 
Cyprideis turosa, Jones. Pl. IV. figs. 11-28. 
Cyprideis torosa, Jones, Entomostraca of the Tertiary Formation of 
England, 1856, p. 21, pl. 2. figs. 1 a-1 7, and woodcut, fig. 2, p. 16. 
Candona torosa, Jones, Ann. & Mag. Nat. Hist. ser. 2, 1850, vi. p. 27, 
pl. 3. fig. 6. 
Valves oblong, convex, somewhat broader in front than behind. 
Ventral margin straight, or with a very slight sinuation, mostly 
furnished with a single stout spine at the posterior angle ; 
dorsal margin arched, higher anteriorly. Hinge-margin of 
the right valve bearing a series of corrugations or elongated 
tubercles, which are received into corresponding depressions 
of the opposite valve. Extremities obtusely rounded. The 
right valve is smaller than the left, and has the dorsal margin 
inclined more steeply, and almost in a right line, from before 
backwards. “Surface of the valves marked with closely set 
angular pittings,” and with a more or less conspicuous trans- 
verse sulcus somewhat in front of the centre. Young speci- 
mens are sometimes furnished also with a few short, thinly 
scattered hairs, and at the postero-inferior angle, near the 
spine before mentioned, there is often a conspicuous group of 
rather long hairs. Lucid spots arranged in a transverse 
row of about four near the sulcus. Dorsal aspect ovate, 
irregularly and obsoletely angular. Length >33, inch; 
height ;22; inch. 
The occurrence of this speciesin a recent state was first men- 
tioned by Professor T. Rupert Jones (doc. cit.), who obtained it 
from ditches of brackish water at Gravesend, and who has kindly 
supplied me with specimens from that locality for examination. 
These ditches are now, I believe, nearly silted up with mud and 
decomposing matter. It has also been taken by the Rev. A. M. 
Norman on the sands at Weston-super-Mare, to which position 
it had probably been washed by the Uphill River. Mr. Norman 
has recently taken it in fresh water in the “ Forge Dam,” Sedge- 
-field, and in immense profusion in brackish water at Hartlepool. 
-Lastly, I have myself found it in extraordinary numbers in 
-estuarine pools at Warkworth. 
