192 REPORT— 186 J.. 



margin. End view triangular. Carajjace white, opaque, punctate. Length 

 one -third of a line. 



Cijilicre guttata, Worman (n. sp.). 



Ovate or peach-stone-shaped, slightly produced to a central point behind ; 

 greatest height and greatest tumidity before the centre ; very tumid. Dorsal 

 margin nearly straight in the centre, suddenly sloping posteaUy, and forming 

 in conjunction with the infero-posteal similarly suddenly sloping margin a 

 small truncated i^rojection. Ventral margin sHghtly waved. Anterior ex- 

 tremity broadly rounded. Carapace excavated with large cells, whicli have 

 a somewhat concentric arrangement. Length a quarter of a line. 



Cytliere multlfora, Norman (n. sp.). 



Oblongo-ovate, of nearly equal height throughout ; length to breadth as 

 two and a half to one ; abruptly swollen immediately above the margin of the 

 valves, and thence sloping to the dorsal margin. Dorsal and ventral margins 

 nearly straight and subparallel; both extremities rounded. Dorsal view 

 prismoidal (parallel-sided, with conical extremities). Carapace excavated with 

 large, deep cells, which leave the interstices standing out in the form of an 

 elegant network. Junction of the valves keeled. Length one-fourth of a Hue. 



Cijthere lavata, Norman (n. sp.). 



Oblongo-ovate, highest before the middle at the commencement of the 

 supero-anteal slope; length to breadth as one and three-quarters to one; 

 moderately convex. Ventral margin slightly concave on the anterior half, 

 and convex posteriorly ; dorsal margin nearly straight, the anterior slope the 

 longer. Anterior extremity well rounded, gradually arched iuto the supeiior 

 margin above, more suddenly rounded below. Posterior extremity slightly 

 produced centrally ; the superior and inferior slopes nearly equal. Lucid spots 

 consisting of four oblong impressions in a transverse line, and a semicircular 

 spot in front. Carapace white, smooth, polished, with a few small scattered 

 punctures ; valves bordered by a keel-lLke hllet, which is more conspicuous 

 behind. Length not one-third of a line. 



'o'- 



Otjthere declivis, Nonuan (n. sp.). 



Subtriangular, closely resembling a miniature 3L/iihis cdulis in form; 

 liighest before the middle ; length to breadth as about one and three-quarters 

 to one ; subcomi^ressed. Ventral margin slightly (rarely considerably) in- 

 curved in the centre ; dorsal margin anteriorly well arched, but sloping rajjidly 

 from about the middle towards the posterior extremity. Anterior end wide 

 and well rounded ; posterior extremity narrow, rounded. Lucid spots con- 

 sisting of four, placed close together in a transverse curved line (of which the 

 lowest is the largest, and each of those above smaller than its predecessor) ; 

 and in front of these a large comma-formed spot, apparently formed by the 

 coalescence of two. Ventral view cimeiform, moderately convex behind, much 

 compressed in front ; juncture of the valves impressed. Carapace white, trans- 

 lucent, smooth, but marked with conspicuous opaque-white, scattered pimc- 

 lures; anterior margin with radiating rib-like markings. Length not quite 

 one-third of a line. 



Cythere Bradii, Norman (n. sp.). 



Oblongo-ovate, of nearly equal height throughout ; length to breadth as 

 two and a half to one ; very tumid. Ventral margin nearly straight, very 

 slightly incurved a little before the middle; dorsal margin subparallel to 



