64 CARBONIFEROUS ENTOMOSTRACA. 



1876 Cytherella circumscripta, Blake, Lias of Yorkshire, p. 434, pi. 19, f. 14. Lias. 

 1876 — crepidula, Blake, Lias of Yorkshire, p. 434, pi. 19, f. 15. Lias. 



(1878) — parallela (Reuss), G. S. Brady, Trans. Zool. Soc, vol. x, p. 407, 



pi. 62, f. 2. Tertiary. 

 1878 — nodosa, G. S. Brady, Trans. Zool. Soc, vol. x, p. 407, pi. 62, f. 2. 



Tertiary. 

 1878 — elliptica, G. S. Brady, Trans. Zool. Soc, vol. x, p. 407, pi. 62, f. 6. 



Tertiary. 

 1878 — Fischeri, Terquem, Mem. Soc. geol. France, ser. 3, vol. ii, p. 94, 



pi. 15, f. 21, a— d. Tertiary. 

 (1880) — polita, G. S. Brady, Challenger Report, p. 172, pi. 43, f. 5, a— c; 



and pi. 44, f. 1, a — g. Recent. 

 1880 — lata, G. S. Brady, Challenger Report, p. 173, pi. 44, f. 5, a—e. 



Recent. 

 1880 — dromedaria, G. S. Brady, Challenger Report, p. 173, pi. 43, f. 6, 



a, b. Recent. 

 (1880) — truncata, G. S. Brady, Challenger Report, p. 174, pi. 36, f. 3, a— d. 



Recent. 

 (1880) — pulchra, G. S. Brady, Challenger Report, p. 174, pi. 44, f. 3, a— b. 



Recent. 

 (1880) — punctata, G. S. Brady, Challenger Report, p. 174, pi. 36, f. 6, a, b ; 



and pi. 44, f. 4, a— g. Recent. 

 (1880) — semitalis, G. S. Brady, Challenger Report, p. 175, pi. 44, f. a—e. 



Recent. 

 1880 — venusta, G. S. Brady, Challenger Report, p. 176, pi. 43, f. 4, a— d. 



Recent. 

 1880 — cribrosa, G. S. Brady, Challenger Report, p. 176, pi. 26, f. 5, a—d. 



Recent. 

 1880 — cavernosa, G. S. Brady, Challenger Report, p. 177, pi. 36, f. 5, a—d. 



Recent. 

 (1880) — cingulata, G. S. Brady, Challenger Report, p. 177, pi. 43, f. 1, a— g, 



and f. 2, a — d. Recent. 

 1880 — irregularis, G. S. Brady, Challenger Report, p. 178, pi. 43, f. 3, a— c. 



Recent. 

 1880 — latimarginata, G. S. Brady, Challenger Report, p. 178, pi. 26, f. 7, 



a — d. Recent. 



To indicate the common and the rarer modifications of form which the valves of this 

 genus present, the following Table has been constructed. In it the chief divisions, based 



