362 MR. G. S. BRADY ON NEW OR IMPERFECTLY 
2. CyTHERELLA PuNcTATA, n. sp. (PI. LVIL. fig. 2, a, b.) 
Oblong-oval, convex, narrowed anteriorly. The dorsal margin is straight, the ventral 
irregularly sulcate on its anterior half; its posterior half sloping steeply backwards. 
Dorsal aspect compressed, ovate or subcuneate. Surface thickly set with round puncta- 
tions, irregularly puckered towards the ventral border. Lwcid spots similar to those 
of the preceding species. 
Length #5 in. (‘57 mm.). 
Hab. Levant (sponge-sand). 
3. CYTHERELLA BEYRICHI, Reuss. (Pl. LVII. fig. 3, a, b.) 
Cytherina beyrichi, Reuss, Zeitsch. Deutsch. Geol. Ges. iii. p. 89, t. 7. fig. 65. 
Cytherella beyrichi, Bornemann, Zeitsch. Deutsch. Geol. Ges. vii. p. 354, t. 20. fig. 1. Speyer, 
Ostracoden der Casseler-Tertiirbildung, p. 54, t. 1. fig. 1, a-c. 
Cytherella compressa, var. 1, Jones, Entom. of Tert. Form. of England, p. 55, pl. 5. fig. 18. 
Valves compressed, oblong oval. Extremities rounded, posterior rather the broadest. 
Ventral and dorsal margins gently sinuated in the middle. Surface smooth, closely 
punctate. Seen from below, the carapace is compressed, oblong, quadrilateral, nar- 
rowed in front, and truncate at each extremity. 
Length =; in. (‘8 mm.). 
Hab. Norway (Messrs. M‘ Andrew and Barrett’s dredgings). 
4. CyTHERELLA RUGOSA, n. sp. (PI. LVII. fig. 4, a, 5.) 
Carapace quadrilateral, surrounded by a flattened border. Dorsal and ventral mar- 
gins parallel; ventral sinuated, dorsal nearly straight. Hwtremities rounded ;_ the pos- 
terior rather flattened, with rounded angles. Seen from below, the carapace is 
compressed, cuneate. Surface of valves minutely and closely pitted, raised into irre- 
gular flexuous elevations. Lucid spots similar to those of C. pulchra. 
Length 35 in. (‘57 mm.). 
Hab. Australia. 
Genus JONEs#A, nov. gen. 
Limbs long and slender. Antenne exceedingly small, slender, and destitute of 
spines. Carapace elongated, compressed, rounded in front, narrowed or acutely pointed 
behind. Shell thin and fragile, mostly without sculpture of any kind. Hinge-margins 
perfectly simple ; consisting of two thin opposing edges held together by a ligamentous 
tissue: straight, or slightly sinuous towards each extremity. Lucid spots linear- 
oblong in shape, arranged in a parallel series, those in the middle being the longest ; the 
whole group forming an obliquely-transverse oval patch near the centre of the valve. 
