BRACHIOPODA. 265 



Genera (1) CENTRONELLA, Billings, 1859; (2) ORISKANIA, 

 GEN. NOV.; (3) SELENELLA, gen. nov. ; (4) ROMINGERINA, 

 GEN. NOV.; (5) TRIGERIA, Bayle, 1875; (6) NOTOTHYRIS, 

 Waagen, 1882. 



PLATES L, LXXVI, LXXIX. 



(5) 1841. Terehratula, Phillips. Palaeoz. Foss. Cornwall, Devon and West Somerset, p. 91, pi. xxxv, 



6g. 167. 

 WiynchoneUa, Hall Tenth Ann. Rept. N. Y. State Cab. Nat. Hist., p. 124, figs. 1-6. 

 CentTonella, Billings. Canadian Naturalist and Geologist, vol. iv, p. 131, fig-s. 1-5. 

 Rhynchospira, Hall. Thirteenth Ann. Rept. N. Y. State Cab. Nat. Hist., p. 83. 

 CentroneUa, Billikgs. Canadian Journal, vol. vi, p. 271, tig. 97; p. 272, figs. 98, 99. 

 Centronella, Hall. Fourteenth Ann. Rept. N. Y. State Cab. Nat. Hist., p. 102. 

 CentroneUa, Hall. Fifteenth Ann. Rept. N. Y. State Cab. Nat. Hist., pi. iii, figs. 1-5. 

 CentroneUa, Billimgs. Canadian Naturalist and Geologist, vol. vii, p. 392. 

 CentroneUa, A. Wischbll. Proc. Acad. Nat. Sci. Philadelphia, vol. vii, p. 405. 

 RensgelcBTia, Billings. Proc. Portland Soc. Nat. Hist., vol. i, p. 115, plate, fig. 12. 

 Terebratiila, Davidson. Quarterly Journal Geological Society, vol. xviii, p. 27, pi. ii, fig. 4. 

 CentroneUa, Hall. Sixteenth Ann. Rept. N. Y. State Cab Nat. Hist., pp. 45-47, figs. 13-17. 

 CentroneUa, Hall. American Journal of Science, vol. xxxv, p. 402. 

 CentroneUa, Billings. American Journal of Science, vol. xxxvi, p. 236. 

 CentroneUa, Billings. Geology of Canada, p. 374, figs. 403-405. 

 CryptoneUa, Hall. Sixteenth Ann. Rept. N. Y. State Cab. Nat. Hist., pp. 41-43. 

 CryptoneUa, Hall. American Journal^of Science, vol. xxxv, pp. 399-402. 

 TerebratiUa, db Koninck. Fobs. Paleoz. de I'lnde, p. 32, pi. ix, tig. 4. 

 CentroneUa, A. Winchell. Pi'oc. Acad. Nat. Sci. Philadelphia, vol. ix, pp. 122, 123. 

 CentroneUa, Hall. Palaeontology of New Yoi'k, vol. iv, pp. 399^03, 420, pi. Ixi A, figs. 1-40. 

 CenitnmeUa, Hall. Palaeontology of New York, vol. iv, p. 419, \i\. IxiA, figs. 47-49. 

 CeTitroneUa, Hall. Palaeontology of New York, vol. iv, p. 419, pi. IxiA, figs. 41-45. 

 CentroneUa, Hall. Palieontology of New York, vol. iv, p. 276, pi. xlv, figs. 1-6. 

 CentroneUa, A. Wischbll. Proc. American Philosophical Society, vol. xii, p. 254. 

 Trigtria, Bayle. Explic. de la Carte Geolog. de France, Atlas, pi. xiii, figs. 5-12..- 

 Terebratula, Abich. Geolog. Forsch. in der Kaukasisch. Landern, I, p. 68, pi. vi, tig. 10. 

 CentroneUa, Davidson. British Devonian Brachiopoda, Suppl., p. 14, pi. i, figs. 7-9. 

 Notothyris, Waaobn. Productus limestone Fossils; Brachiopoda, pp. 375-390, pi. xxviii, 



figs. 1-13; pi. XXX, figs. 13, 14. 

 1883. CentroneUa, (Eklert. Bull, de la Soc. d'Etudes Scientif. d'Angers, pp. 1-11, pi. i, figs. 1-11; 



pi. ii. figs. 1-6. 

 1885. CerUroneUa, (Ehlkrt. Bull, de la Societe d'Etudes Scientif. d'Angei-s, pp. 1-5, plate, 



tigs. 1-19. 



1888. CentroneUa, Hbhrick. Bull. Denison Univeraity, vol. iii, p. 49, pi. ii, fig. 5. 



1889. CentroneUa, Nbttblroth. Kentucky Fossil Shells, p 153, pi. xxxi, figs. 14-17. 

 t 1890. CentroneUa (f), Derby. Archivos do Museu Nacional do Rio de Janerio, vol. ix, p. 84. 

 t 1890. Notothyris (f), Dbrby. Archivos do Museu Nacional do Rio de Janeiro, vol. ix, p. 81. 



1892. CentrcmeUa, Bkbcher and Clarke. American Journal of Science, vol. xliv, p. 414. 



(2 



In discussing the genus Renssel^ria and its subgenus Beachia, it has been 

 observed that these shells combine a plicated or striated exterior with a brach- 

 idium constructed upon the same type as that of Centronella, Billings. 



