60 Mr. G. S. Brady on Species of 



Ct/pris striolata, n. sp. PI. III. figs. 12-17. 

 Valves broadly subreniform ; dorsal margin greatly arched; 

 ventral margin slightly sinuated ; 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 -y^ inch ; height ^^ 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 striatiou 

 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, Memoires des Savants Etrangers, St. Petersburg, 

 vol. vii. p. 146, pi. 4. f. 1-11; Lilljeborg, De Crust, ex ord. tribus 

 Cladocera, Ostraeoda, et Copepoda in iScania occurrentibus, p. 116, 

 pi. 11. f. 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 cai'apace is broadly oval in form, with pointed 

 extremities. Colour olive-grey or brown. Length -r|-g-o inch ; 

 height -r§-g-o 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- 

 spicuous, 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 PI. III. fig. 7. It will be seen 



