404 



MR. G. S. BRADY'S MONOGRAPH OF 



11. Cythere pulchella, nov. sp. 



Arctic type. Distribution : Recent — Scotland^ Baffiu^s Bay. Fossil — Scotland, glacial clay. 



Carapace of female, viewed laterally, subreniform, greatest height in front of the 

 middle and equal to considerably more than half the length ; anterior extremity broadly 

 rounded, posterior obliquely subtruncate, scarcely rounded ; superior margin highest over 

 the eyes, thence sloping backwards with a gentle curve, inferior sinuated in the middle ; 

 outline, as seen from above, ovate, widest behind the middle, greatest width equal to 

 nearly one-half the length, extremities pointed. Surface of the shell closely punctate. 

 Hinge-teeth of the right valve forming two projecting crests, which end abruptly at the 

 terminal extremities, but slope gradually towards the middle of the hinge-line, and are 

 crenulated on their edges. Upper antennse armed at the apices of the last four joints 

 with slender, slightly curved spines, third and fourth joints coalescent ; flagellum of the 

 lower antenna biarticulate, alike in male and female. Mandibular palp bearing three 

 curved pectinate setse (as in Cytliereis, Sars). Peet short and stout, their terminal claws 

 much dilated at the base, nearly straight in the middle, and suddenly curved (almost 

 hooked) at the apex. 



Length ^ inch. : ^'^''^ 



This species is not very unlike C. mllosa in general appearance, but is smaller, less 

 compressed from side to side, with more rounded outlines and a much finer surface- 

 ornament. The only recent British specimen I have seen is one, apparently immature, 

 which occurred in some shell-sand gathered by Mr. D. O. Drewett in Hespond Bay, Loch 

 Erribol, N.B. It occurs more plentifully in some of the Scottish glacial formations, and 

 will be fully figured in a forthcoming work on the Posttertiary Entomostraca. Mr. 

 Crosskey has also found it abundantly in some recent gatherings from Davis's Straits ; 

 and from these specimens the anatomical details above given have been derived. 



b. Carapace, as seen from the side, quadiHlateral, highest in front, ventricose, often prominently rugose or 



spinous. 



* Mandibular palp three-Jointed, simply setose. Urticating setce equal in the male and female. 



12. Cythere cuneieormis, Brady. (Plate XXXI. figs. 47-54.) 

 Cythere ventricosa, Sars, loc. cit. p. 34. 



British type. Distribution : Recent — Great Britain, Ireland, Norway. Fossil — Glacial clays and 

 raised beaches, Scotland and Norway. 



Carapace subprismoid, depressed behind, acutely angular on the dorsal and slightly 

 convex on the ventral surface. Female, as seen from the side, subclavate, greatest height 

 at the anterior third, and equal to about half the length ; anterior extremity broadly and 

 obliquely rounded, posterior obtusely pointed (in the adult). Superior margin nearly 

 straight and gently sloping as far as the posterior fourth, thence sloping steeply to the 

 extremity ; inferior margin straight, or irregularly sinuated. Outline, as seen from above, 

 ovate, acuminate behind, obtusely pointed in front ; greatest width behind the middle, 

 equal to nearly half the length. End view triangular, the base slightly convex. Surface 



