382 MR. G. S. BRADY ON NEW OR IMPERFECTLY 



angles acute. Surface marked with oblong, angular pittings, which tend to run 

 into transverse strise. 



Length -^ in. (-635 mm.). 



Hab. Hunde Islands, 25-30 fathoms {Dr. Sutherland). 



Genus Normania, nov. gen. 

 Animal like Cyfhere : limbs long and slender ; antennae 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. Hincjement 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. (PI. LXI. fig. 15, a-c.) 



Carapace obUquely 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 -^ 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 sufiicient difference, 

 both in form and sculpturing, to warrant my considering it a distinct species. 



2. Normania affinis, n. sp. (PI. LXI. fig. 12, a-d.) 



Carapace obliquely quadrilateral, convex. Anterior and posterior extremities 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 -^^ in. (-6 mm.). 

 '• Hah. Levant (sponge-sand) ; common, 



3. Normania glabra, n. sp. (Pi. LXI. fig. 11, a-d.) 



; Valves obliquely quadrilateral, excessively convex in the centre, with a wide, flattened 



