408 DR. G. 8S. BRADY ON THE OSTRACODA 
posterior extremity of each valve are situated two large, polished bead-like tubercles— 
one near the dorsal, the other near the ventral surface.. Seen from above, the outline 
is somewhat boat-shaped, subtruncate behind, and with wide produced keel in front; 
greatest width situated in the middle, and equal to less than half the length. End 
view ovate. Surface of the shell closely pitted with circular puncta. Length #5 inch 
(0°65 millim.). 
C. nodosa occurred in moderate numbers in the Pectunculus-bed, and also in the 
Panopea-beds of Kiel and Edeghem. In general character it is very nearly allied to 
C. leioptycha, Reuss, but differs in minor details, being more tumid, less angular in its 
contours, and wanting in longitudinal ribs. 
DESCRIPTION OF THE PLATES. 
The letters a, 6, c, d in these illustrations refer to the various aspects of the shell, as follows :— 
a, seen laterally ; b, seen from above; c, seen from below; d, seen from the front. 
PLATE LXII. 
Figs. 1 a-ld. Cytheridea papillosa, var. Figs. 4a, 46. Cytheridea miilleri 2 . 
levis. Figs. 4c-4e. Cytheridea miilleri 3. 
Figs. 2 a-2 ¢c. Cytherella parallela. Figs. 5 a—-5 d. Cytherella nodosa. 
Figs. 3 a-3 d. Cytheridea pinguis. Figs. 6a, 66. Cytherella elliptica. 
PLATE LXIITI. 
Figs. la-ld. Cythere tarentina. Figs. 5a—5 d. Paracypris polita. 
Figs. 2 a—2 d. Cytherideis (1) lithodomoides. Figs. 6a, 66. Pontocypris faba . 
Figs. 3 a—3 d. Cytherideis recta. Figs. 6 ce-6 e. Pontocypris faba o. 
Figs. 4a—4 ce. Pontocypris propinqua. Figs. 7 a-7 c. Bairdia oviformis. 
PLATE LXIV. 
Figs. 1 a—-ld. Cythere cedichilus. Figs. 6 a, 66. Cythere plicatula. 
Fig. 2. Paradoxostoma ensiforme. Figs. 7 a-7 d. Cythere wetherellii. 
Figs. 3 a—3 d. Cythere cicatricosa. Figs. 8 a—8 d. Cythere latimarginata. 
Figs. 4a, 4b. Cythere cribrosa? Figs. 9a, 96. Cythere limicola. 
Figs. 5 a—5 d. Cythere petrosa. 
PLATE LXV. 
Figs. 1 a-ld. Cythere ellipsoidea. » Figs. 4a,46. Cythere woodiana. 
Figs. 2 a-2h. Cythere jurinei. Figs. 5 a—-5 d. Cythere plicata. 
Figs. 3a, 36. Cythere belgica. 
