KNOWN SPECIES OF MARINE OSTRACODA. 
DESCRIPTION OF THE PLATES. 
PLATE LVII. 
Fig. 1. Cytherella pulchra. 
a. Right valve (exterior), x 50. 
b. do. (interior), x 50. 
C. do. dorsal aspect, x 50. 
d, Lucid spots, x 120. 
2. Cytherella punctata. 
Right valve, outside, x 50. 
do. dorsal aspect, x 50. 
a 
Sao a 8 
3. Cytherella beyrichi. 
Left valve, outside, x 50. 
do. dorsal aspect, x 50. 
Fig. 4. Cytherella rugosa. 
Right valve, outside, x 50. 
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6. Left valve, dorsal aspect, x 50. 
Fig. 5. Bairdia bosquetiana. 
a. Perfect carapace, right side, x 40. 
b. do. ventral aspect, x 40. 
fab do. dorsal aspect, x 40. 
d. End view, x 40. 
e. Lucid spots, x 80. 
Fig. 6. Bairdia amygdaloides. 
a. Right valve, outside, x 40. 
5. Left valve, outside, x 40. 
(@. do. inside, x 40. 
g. 7. Bairdia ovata. 
a Left valve, outside, x 40. 
b do. dorsal aspect, x 40. 
Cc. do. inside, x 40. 
Fig. 8. Bairdia subdeltoidea. 
a. Right valve (old), outside, x 40. 
b, Left valve, outside, x 40. 
c. Perfect carapace, dorsal aspect, x 40. 
d. do. ventral aspect, x 40. 
e. Left valve, inside, x 40. 
J. Right valve, inside, x 40. 
g. End view of carapace, x 40. 
h. Lucid spots, x 75. 
Fig. 9. Bairdia fusca. 
a. Perfect carapace, right side, x 40. 
b. do. dorsal aspect, x 40. 
C. do. ventral aspect, x 40. 
d. do. end view, x 40. 
Fig. 10. Bairdia crosskeiana. 
a. Perfect carapace, left side, x 40. 
b do. dorsal outline, x 40. 
c. do. ventral outline, x 40. 
d. do. end view, 40x. 
Fig. 11. Jonesia simplex. 
a. Left valve, outside, x 40. 
b. Perfect carapace, dorsal view, x 40. 
c. Right valve, inside, x 40. 
d. End view, x 40. 
e. Lucid spots, x 220. 
Fig. 12. Cytherideis maculata. 
a. Left valve, outside, x 40. 
b. do. inside, x 40. 
Fig, 13. Cytherideis decora. 
a. Right valve, outside, x 40. 
b. do. inside, x 40. 
C. do, dorsal outline, x 40. 
PLATE LVIII. 
Fig. 1. Cytherideis gracilis. 
a. Perfect carapace, right side, x 40. 
b do. dorsal view, x 40. 
c. Right valve, ventral aspect, x 40. 
d. End view, x 40. 
Fig. 2. Cytherideis oryza. 
a. Perfect carapace, right side, x 40. 
b do. dorsal view, x 40. 
Fig. 3. Cytherideis pulchra. 
a. Left valve, outside, x 40. 
b. do. inside, x 40. 
C. do. dorsal outline, x 40. 
Fig. 4. Cytherideis lata. 
a. Right valve, outside, x 40. 
b. do. dorsal outline, x 40. 
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