110 OSTRACODA NEW TO BRITAIN. 
species is found in favourable localities, such as those at Hartle- 
pool and Warkworth, and is the more remarkable, as in Cythere, 
so far as I have observed, the ova are very few in number. 
EXPLANATION OF THE PLATES. 
PuatTE IL. 
Fig. 1. Oypris oblonga (Brady), dorsal aspect; X 30. 
Fig. 2. Ditto, ventral aspect; x 30. 
Fig. 3. Ditto, left valve; X 30. 
Fig. 4. Ditto, abdominal ramus; xX 120. 
Fig. 5. Cypris fusca, abdominal ramus; x 120. 
Fig. 6. Cypris_afinis (Fischer), abdominal ramus; x 120, 
Fig. 7. Ditto, shell-sculpture; x 310. 
Fig. 8. Ditto, lucid spots; < 120. 
9 
. Ditto, ventral aspect; x 40. 
Fig. 10. Ditto, dorsal aspect; x 40. 
Fig. 11. Ditto, right valve; x 40. 
Fig. 12. Cypris striolata (Brady), left valve; x 40. 
Fig. 13. Ditto, dorsal aspect; xX 40. 
Fig. 14. Ditto, ventral aspect; x 40. 
Fig. 15. Ditto, shell sculpture; x 310. 
Fig. 16. Ditto, lucid spots; x 310. 
Fig. 17. Ditto, abdominal ramus; x 210. 
Puate IIL. 
Fig. 1. Candona virescens (Brady), right valve; x 40. 
Fig. 2. Ditto, dorsal aspect; x 40. 
Fig. 3. Ditto, ventral aspect; x 40. 
Fig. 4. Ditto, superior antenna; X 100. 
Fig. 5. Ditto, inferior antenna x 100. 
Fig. 6. Candona albicans (Brady), left valve; x 40. 
Fig. 7. Ditto, dorsal aspect; x 40. 
Fig. 8. Ditto, ventral aspect; x 40. 
Fig. 9. Ditto, shell-sculpture; x 210. 
Fig. 10. Ditto, lucid spots; x 210. 
Fig. 11. Cyprideis torosa (Jones), superior antenna; X 100. 
Fig. 12. Ditto, inferior antenna; x 100. 
Fig. 13. Ditto, second leg; x 100. 
Fig. 14. Ditto, third leg; x 100. 
Fig. 15. Ditto, ringed seta; X 400. 
ivigs. 16-18, Ditto, outlines of carapace (Gravesend specimens); XX 20. 
Figs. 19-21. Ditto, outlines of carapace (Warkworth specimens); X 20. 
Fig. 22. Ditto, posterior margin, with spine; X 20. 
Fig. 23, Ditto, with ova; X 40. 
