60 Mr. G. 8. Brady on Species of 
Cypris striolata, nu. sp. Pl. III. figs. 12-17. 
Valves broadly subreniform; dorsal margin greatly arched ; 
ventral margin slightly simuated ; anterior and posterior mar- 
gins obtusely rounded; the highest part of the carapace 
somewhat behind the middle. Viewed from above, the cara- 
pace is much compressed, and tapering toward the extremi- 
ties, of which the posterior is more obtusely rounded than the 
anterior. Surface of the valves smooth, and regularly marked 
with beautifully fine, anastomosing, longitudinal striations. 
Colour deep brown. Length +3, inch; height +2, inch. 
This approaches very closely to C. compressa; and, except in 
the sculpturing of the carapace (which is very well-marked and 
characteristic) and the sinuation of its lower margin, I cannot 
find any feature which distinctly separates it from that species. 
The valves of C. compressa are more or less deeply pitted; and 
in no instance have I been able to find any trace of the striation 
which distinguishes the present species. The general contour 
of C. striolata is more nearly reniform, the lower edge being 
decidedly sinuated, and the extremities are not quite so abruptly 
rounded. It is also larger than C. compressa. 
Habitat. Broomley Lough, Northumberland. April 1863. 
Cypris affinis, Fischer. PI. III. figs. 6-11. 
Cypris affinis, Fischer, Mémoires des Savants Etrangers, St. Petersburg, 
vol. vi. p. 146, pl. 4. f. 1-11; Lilljeborg, De Crust. ex ord. tribus 
Cladocera, Ostracoda, et Copepoda in Scania occurrentibus, p. 116, 
pl. 11. £. 8-14. ; 
Valves elongated, broad anteriorly; upper margin arched, highest 
a little in front of the centre, and with a slight gibbosity, 
from which it slopes gently backward ; inferior margin sinu- 
ated; extremities rounded, the posterior being much the 
narrowest. Valves sculptured with a reticulated pattern, 
giving somewhat a scaly appearance to the surface. Seen 
from above, the carapace is broadly oval in form, with poimted 
extremities. Colour olive-grey or brown. Length +49, inch ; 
height +22, inch. 
This species is easily distinguished by the peculiar sculpturing 
of the valves, which, in fine specimens and with good illumina- 
tion under the microscope, resembles an exquisitely wrought 
pattern of silver filagree-work. The reticulations of which the 
ornament is composed are largest toward the extremities of the 
valves: across the middle of the carapace they are not very con- 
spicnous, as the shell-structure is there more condensed. The 
junction of the open work of the extremities with that of the 
closer central band is shown in Pl. III. fig. 7. It will be seen 
