KNOWN SPECIES OF MARINE OSTRACODA. 373 
Extreme forms of this variety are very distinct from well-marked examples of the 
typical C. jurinei; but in the gathering from which my specimens were taken there 
occur many individuals intermediate between the two. This, with the smaller size and 
more delicate marking of the variety costata, leads me to infer that it is only the 
young or a variety of C. jurinet. 
3. CyrHere noper, n. sp. (PI. LIX. fig. 3, a, db.) 
Carapace oblong-oval, convex. Dorsal and ventral margins gently arched. The 
anterior border is well rounded, forming a flattened lamina, and is armed inferiorly with 
several short, blunt teeth. Posterior border narrowed, bearing three spines, one of 
which is very long. Dorsal aspect ovate. Surface of the shell smooth, marked on its 
posterior half with longitudinal rows of pittings, which partially coalesce so as to form 
moniliform furrows. 
Length 3'5 in. (‘79 mm.). 
Hab. Levant (sponge-sand). One specimen. 
4, CyTuere(?) MAMILLATA, n. sp. (Pl. LIX. fig. 6, a—c.) 
Oblong, subreniform, broadest in front, twice as long as broad. Anterior margin well 
rounded, produced downwards below the level of the ventral margin ; posterior margin 
narrow, bent in the middle at an obtuse angle. Dorsal margin arched ; ventral margin 
straight. Dorsal profile oval. Surface of the valves minutely punctate, and raised into 
several irregularly placed, rounded elevations or mamille. 
Length 3/5 in. (°32 mm.). 
Hab. Atlantic Ocean, 110 fathoms. One valve. 
5. CYTHERE OBLONGA, n. sp. (PI. LIX. fig. 5, a-d.) 
Carapace oblong, quadrilateral, convex, more than twice as long as broad. ztre- 
mities truncate, anterior obliquely rounded and often toothed, posterior obliquely flat- 
tened, produced and often serrated inferiorly. Dorsal margin slightly convex, ventral 
incurved along its whole length. Dorsal aspect broadly oval. End view oval, broadest 
in the horizontal diameter. Surface of valves marked with somewhat distant, oblong, 
pittings. 
Length 3/5 in. (84 mm.). 
Hab. Levant (sponge-sand). Several specimens. 
6. CyrHere caANALicuLata, Reuss. (Pl. LIX. fig. 4, a.) 
Cypridina canaliculata, Reuss, Haidinger’s Abhandl. iii. p. 76, t. 9. fig. 12. 
Cythere canaliculata, Egger, Ostrak. der Miocan-Schicht. p. 33, t. 5. figs. 10, 11. 
Carapace oblong, sigmoid, compressed. Extremities well rounded, the anterior dis- 
tantly and bluntly serrated. The antero-inferior and postero-superior angles somewhat 
