302 SYNOPSIS OF AMERICAN FOSSIL BRACHIOPODA. [bull. 87. 



PENTAGONIA Cozzeus. Geuotype Pentagouia i)eeisii Cozzeiis= 



Atiypa imisulcata Conrad. 

 Pentagouia Cozzens, Annals Lyceum Nat. Hist. N. Y., IV, 1846, p. 158. — Meek 

 and Hayden, Smithsonian Cont. Knowledge, XIV, 172, 1864, p. 16. — Hall and 

 Clarke, I'al. New York, VIII, Pt. II, 1895, j>. 80 ;— Thirteenth Ann. Rep. N. Y. 

 State Geologist, 1895, ]•. 775. 

 Gonioccelia Hall, Fourteenth Rep. N. Y. State Cab. Nat. Hist., 1861, p. 101. 



Pentagouia peersii Cozzens=Pentagonia unisulcata. 



Pentagonia unisulcata (Conrad). Oriskany to Hamilton (Dev.). 



Atrypa unisulcata Conrad, Fifth Ann. Rep. Geol. Survey of N. Y., 1841, p. 56. — 



Hall, Fifteenth Rep. N. Y. State Cab. Nat. Hist., 1862, pi. 11, iig. 10. 

 Pentagonia peersii Cozzens, Annals Lyceum Nat. Hist. N. Y., IV, 1846, p. 1.58, pi. 



10, fig. 3. 

 Rhynchonella unisulcata Hall, Tenth Rep. N. Y. State Cab. Nat. Hist., 1857, 



p. 125. 

 Athyris? unisulcata Billings, Canadian Journal, V, 1860, p. 279, tigs. 39-42. 

 Gonioccelia uniangulata Hall, Fourteenth Rep. N. Y. State Cab. Nat. Hist., 



1861, p. 101. 

 Meristella ? unisulcata Hall, Fifteenth Rep. Ibidem, 1862, pi. 2, figs. 17-25. 

 Athyris unisulcata Billings, Geol. Canada, 1863, p. 373, fig. 396. 

 Meristella (Pentagonia) unisulcata varieties liiplicata and uniplicata Hall, Pal. 



New York, IV, 1867, p. 309, pi. 50, figs. 18-35. 

 Meristella unisulcata Nettelroth, Kentucky Fossil Shells, Mem. Kentucky Geol. 



Survey, 1889, p. 99, pi. 15, figs. 9-16. 

 Pentagonia unisulcata Hall and Clarke, Pal. New York, VIII, Pt. II, 1895, p. 80, 



pi. 42, figs. 22-32. 

 Loc. New York; county of Haldimand and Bosanquet, Ontario; Falls of Ohio. 



PENTAMEREILA Hall. Genotype Atrypa arata Conrad. 



Pentamerella Hall, Twentieth Rep. N. Y. State Cab. Nat. Hist., 1867, p. 163;— 

 Pal. New Y^ork, IV, 1867, pp. 373, 375.— Nettelroth, Kentucky Fossil Shells, 

 Mem. Kentucky Geol. Survey, 1889, p. 49.— Hall and Clarke, Pal. New York, 

 VIII, Pt. II, 1893, p. 245;— Thirteenth Ann. Rep. N. Y. State Geologist, 1895, 

 p. 845. 



Pentamerella arata (Conrad). Upper Helderberg (Dev.). 



Atrypa arata Conrad, Fifth Ann. Rep. Geol. Survey N. Y., 1841, p. 55. 

 Atrypa octocostata Conrad, Ibidem, 1841, p. 55. 

 Pentamerus aratus Hall, Tenth Rep. N. Y. State Cab. Nat. Hist., 1857, p. 120, 



figs. 1-10.— Billings, Canadian Journal, VI, 1861, p. 269, figs. 93-96;— Geol. 



Canada, 1863, p. 370, fig. 389. 

 Pentamerella arata Hall, Pal. New York, IV, 1867, p. 375, pi. 58, figs. 1-21.— 



Nettelroth, Kentucky Fossil Shells, Mem. Kentucky Geol. Survey, 1889, p. 



49, pi. 13, figs. 17-20.— Hall and Clarke, Pal. New York, VIII, Pt. II, 1893, 



p. 245, pi. 71, figs. 21-29. 

 ? Pentamerus aratus Tschernyschew, M^m. Comite G6ologique de St. P^ters- 



bourg, III, 1887, p. 101, pi. 4, figs. 18, 19. 

 Loc. New York; Cayuga, etc., Ontario; Columbus, Ohio; Falls of Ohio; ? Urals 



of Russia. 



Pentamerella borealis (Meek). Hamilton (Dev.). 



Pentamerus borealis Meek, Trans. Chicago Acad. Sci., 1, 1868, p. 95, pi. 13, fig. 11. 

 Loc. Anderson River, British America. 



Pentamerella (?) compressa Ringueberg. Niagara (Sil.). 



Pentamerella compressa Ringueberg, Bull. Bufl'alo Soc. Nat. Sci., V, 1886, p. 15, 

 pi. 2, fig. 4. 



