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



2. Cytherella punctata, n. sp. (PI. LVII. 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. Lucid spots similar to those 

 of the preceding species. 



Length 4*5- in. ('57 mm.). 



Hah. Levant (sponge-sand). 



3. Cytherella beyrichi, Reuss. (PI. LVH. 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-Tertiarbildung, p. 54, t. 1. fig. 1, a-c. 

 Cytherella compressa, var. 1, Jones, Entom. of Tert. Form, of England, p. 55, pi. 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 ^2" io- ('8 mm.). 



Hab. Norway {Messrs. M' Andrew and Barrett's dredgings). 



4. Cytherella rugosa, n. sp. (PI. LVIL fig. 4, a, b.) 



Carapace quadrilateral, surrounded by a flattened border. Dorsal and ventral mar- 

 gins iparaWeX ; ventral sinuated, dorsal nearly straight. Extremities 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 -^ in. (-57 mm.). • 



Hab. Australia. 



Genus Jonesia, uov. gen. 



Limbs long and slender. Antenna 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 Ugamentous 

 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-traasverse oval patch near the centre of the valve. 



