382 MR. G. S. BRADY ON NEW OR IMPERFECTLY 
angles acute. Surface marked with oblong, angular pittings, which tend to run 
into transverse striz. 
Length 75 in. (635 mm.). 
Hab. Hunde Islands, 25-30 fathoms (Dr. Sutherland). 
Genus Normania, nov. gen. 
Animal like Cythere: limbs long and slender ; antennz bearing long filaments, and 
quite devoid of spines. Outline of carapace flexuous, obliquely oval or subtetragonal 
(‘‘ peach-stone ” shaped). Valves convex, produced round the whole, or at parts only, 
of their circumference into a flattened laminar border. Dorsal outline oval, tapering at 
both extremities, often strongly keeled. Hingement as in Cythere proper ; the terminal 
processes somewhat feebly developed, with mostly an intervening, finely crenulated 
bar. Surface smooth, punctate or papillose, the sculpturing having mostly a concentric 
arrangement. 
1. NorMANIA AVELLANA, n. sp. (Pl. LXI. fig. 15, a—c.) 
Carapace obliquely oval. Dorsal margin gently arched; ventral obliquely convex, 
sinuated anteriorly. Anterior border obliquely rounded; posterior narrow, obliquely 
truncate and sinuated rather deeply in the middle. Dorsal profile oval, keeled. Sur- 
face marked with large and thickly set pittings. 
Length 3; in. ("74 mm.). 
Hab. West Indies. One specimen. 
This approaches, perhaps too closely, Cythere cicatricosa, Reuss ;. but, so far as I can 
judge from the figures given by Reuss and Bosquet, there seems sufficient difference, 
both in form and sculpturing, to warrant my considering it a distinct species. 
2. Normania arrinis,n. sp. (Pl. LXI. fig. 12, a—d.) 
Carapace obliquely quadrilateral, convex. Anterior and posterior ewtremities nearly 
equal, obliquely rounded, the latter produced inferiorly into a broad, flattened lamina, 
which is continued along the posterior portion of the ventral margin, vanishing in the 
middle and reappearing in front, whence it is continued round the anterior margin. 
Dorsal and ventral margins parallel, straight or slightly sinuated. Dorsal aspect oval, 
broad in the middle; extremities pointed. Surface of the valves covered with closely 
set, deep punctations, which, on the ventral surface, coalesce so as to form longitu- 
dinal furrows. 
Length 5 in. (‘6 mm.). 
Hab. Levant (sponge-sand) ; common, 
3. NormManta GLABRA, 0. sp. (Pl. LXI. fig. 11, a-d.) 
Valves obliquely quadrilateral, excessively convex in the centre, with a wide, flattened 
