BRACHIOPODA. 265 



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

 GEN. NOV. ; (3) S E L E N E L L A , gen. nov. ; (4) ROMINGERINA, 

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



Waagen, 1882. 



PLATES L, LXXVI, LXXIX. 



(S) 18-11. Terehratula, Phillips. Palieoz. Foss. Cornwall, Devon and West Soiner.set, p. 91, pi. xxxv, 



tig. 167. 



(1) 1867. R!iy7whoneUa, Hall Tenth Ann. Rept. N. Y. State Cab. Nat Hist., p. 124, figs. 1-6. 



(1) 1859. Centronella, Billings, ('anadian Natnralist and Geolcigist, vol. iv, p. 131, tigs. 1-5. 



(5) 1860. Rhyuchospira, Hall. Tbii-leenth Ann. Rept. N. Y. State Cab. Nat. Hist., p. 83. 



(1) 1861. Centronella, Billings. Canadian Journal, vol. vi, p. 271, tig. 97; p. 272, tigs. 98, 99. 



(1) 1861. C'CTitnweZte, Hall. Fourteenth Ann. Rept. N. Y. State Cab. Nat. Hist., p. 102. 



(1) 1862. Centronella, Hall. Fifteenth Ann. Rept. N. Y. State Cab. Nat. Hist., pi. iii. figs. 1-5. 



(1) 1862. Centronella, Billisgs. Canadian Naturalist and Geologist, vol. vii, p. 392. 



(4) 1862. Centronella, A. Winchell. Proc. Acad. Nat. Sci. Philadeljihia, vol. vii, p. 405. 



(5) 1862. Rensselmria, Billings. Pi-oc. Portland Soc. Nat. Hist., vol. i, p. 115, jilate, fig. 12. 



(6) 1862. Terebratida, Davidson. Quarterly Journal Geological Society, vol. xviii, p. 27, pi. ii, fig. 4. 

 (1) 1863. Centronella, Hall. Sixteenth Ann. Rept. N. Y. St.ate Cab Nat. Hist., pp. 45-47, figs. 13-17. 

 (1) 1863. Centronella, ll.>i.i,h. American Journal of Science, vol. xxxv, p. 402. 



(1) 1863. Centronella, Billings. Amei-ican Journal of Science, vol. xxxvi, p. 236. 



(1) 1863. Ce7jJ?-07te/Za, Billings. Geology of Canada, p. 374, figs. 403-405. 



(4) 1863. Cryptonella, Hall. Sixteenth Ann. Rept. N. Y. State Cab. Nat. Hist., pp. 41-43. 



(4) 1863. Cryptondla, Hall. American JournaFof Science, vol. xxxv, pp. 399-402. 



(6) 1863. Terehratula, de Koninck. Foss. Paleoz. de I'lnde. p. 32, pi. ix, fig. 4. 



(I)? 1865. Centronella, A. Winciibll. Pi-oc. Acad. Nat. Sci. Philadelphia, vol. ix, jip. 122, 123. 



(1) 1867. Centro7iella, Hall. Pal.TontoIogy of New York, vol. iv, pp. 399-403, 420, pi. Ixi A, tigs. 1-40. 



(3) 1867. Centronella, Hall. Palaeontology of New York, vol. iv, p. 419. j.l. Ixi a, tigs. 47-49. 



(4) 1867. Centronella, Hall. Palseontology of New York, vol. iv, p. 419, pi. Ixi A, figs. 41-45. 



(5) 1867. Centronella, Hall. Palfeontology of New York. vol. iv, p. 276, p!. xlv, figs. 1-6. 

 (1)? 1870. Centronella, A. Wincuell. Proc. American Philosophical Society, vol. xii, p. 254. 



(5) 1875. Trigeria, Bayle. Rxplic. de la Carte Gc'olog. de France, Atlas, pi. xiii, figs. 5-12.-, 



(6) 1878. Tei-ebratula, Abich. Geolog. Forsch. in der Kaukasisch. Landern, I, p. 68, pi. vi, fig. 10. 



(5) 1882. Centronella, Davidson. British Devonian Brachiopoda, Suppl., p. 14, pi. i, figs. 7-9. 



(6) 1882, Nototfiyris, W A AiiEH. Productus limestone Fossils ; Brachiopoda, pp. 375-390, pi. xxviii, 



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

 (5) 1SS3. Centronella, CEhlkkt. Bull, de la Soc. d'Etudes Scientif. d'Angers, pp. 1-11, pi. i, figs. 1-1 1; 



pi. ii. figs. 1-6. 

 (5) 1885. Centronella, CEulert. Bull, de la Societe d'Etudes Scientif. d'Angers, pp. 1-5, plate, 



figs. 1-19. 

 (1) 1888. Centronella, Herrick. Bull. Denison University, vol. iii, p. 49, pi. ii, tig. 5. 



(1) 1889. Centronella, Nettelroth. Kentucky Fossil Shells, p 153, pi. xxxi, figs. 14-17. 



(5) ? 1890. Centronella (.*), Derby. Archivos do Museu Nacional do Rio de Janerio, vol. ix, p. 84. 



(6) ? 1890. Notothyris (.*), Derby. Archivos do Museu Nacional do Rio de Janeiro, vol. ix, p. 81. 



(2) 1892. Centronella, Beechek and Clarke. American Journal of Science, vol. xliv, p. 414. 



In discussing the genus Renssel^eria 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. 



