372 MR. G. S. BRADY ON NEW OR IMPERFECTLY 
ventral margins. The lower portion of the posterior border often much produced and 
toothed. Surface of the valves smooth or marked with all varieties of sculpture. 
1. Cyruere setosa, Baird. (PI. LVIIL. fig. 12, a-c; fig. 13, a—d; fig. 15, a—e.) 
Cythere setosa, Baird, Proceedings of Zoological Society of London, part xviii. 1850, p. 258; Annu- 
losa, pl. 18. f. 28-30. 
Valves oblong-oval or subreniform, compressed, highest at anterior third, surrounded 
wholly or in part by a broad flattened fillet. Dorsal margin arched, somewhat flattened. 
Ventral margin sinuated. Extremities broad, obliquely rounded. Dorsal aspect oblong- 
oval, keeled, often slightly indented near the middle. End view broad, oval. Surface 
smooth or slightly pitted, and bearing a few short hairs. 
Length 3/5 in. (young), 3!;—3'5 in. (adult), (5-74-84 mm.). 
Hab. Hunde Islands (Dr. P. C. Sutherland’s dredgings). Levant. 
2. CyTHerE Jurinet, Von Minster. (Pl. LIX. fig. 1, a—f.) 
Cythere jurinei, Von Minster, Leonh. & Bronn’s Jahrbuch, 1830, p.62. Bosquet, Entom. Fossil. des 
Terr. Tertiair. de la France, p. 56. pl. 2, fig. 9. Speyer, Ostrac. der Casseler-Tertiarbild. p. 15. 
t. 2. fig. 5. 
Oblong , convex; extremities equal, or nearly so. Dorsal margin straight, ventral 
slightly sinuated. Extremities obliquely rounded. Dorsal profile elongate, ovate. Sur- 
face of the valves marked with shallow (scarcely excavated) longitudinal grooves, along 
which are scattered faintly marked pittings. Lucid spots about six, rather small, 
circular, arranged in two transverse rows. 
Length 3p in. (84 mm.). 
Hab. Levant (sponge-sand). 
This is a well-marked species, which, however, varies considerably in the amount of 
surface-marking, the grooving and pitting being often almost or entirely obsolete. The 
longitudinal striz are very shallow, more like facets than grooves, looking as if they 
might have been produced with a joiner’s plane rather than with a gouge. The pittings, 
when well marked, remind one strongly of the appearance of a section of coniferous 
wood under the microscope. 
Var. cosrata. (Pl. LIX. fig. 2, a—d.) 
Oblong, subquadrangular. Extremities obliquely rounded, the anterior being broadest. 
Dorsal and ventral margins nearly straight, the former sloping backwards from the 
anterior hinge-joint. Dorsal aspect oblong subovate, only slightly narrowed in front: 
outline somewhat sinuous. Surface marked with delicate longitudinal ridges, which, 
on the central portion of the valves, are connected at distant intervals by oblique cross- 
ridges. The furrows are dotted with small pits, often arranged in pairs. 
Length 35 in. (‘63 mm.). 
Hab. Levant (sponge-sand). 
