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



PENTAGONIA Cozzeus. Geuotyi)C i'ciitagouiii i»cersii Cozzeiis= 



Atiypii unisiilciita Conrad. 

 I'eutagoiiia Cozzena, Annals J.ycciiiii Nat. Hist. N. Y., IV, l^ltj, j). 1.58. — Meek 

 au(l Haydeu, SmitLsoniau Cont. Knowiedgo, XIV, 172, 1804, p. 16. — Hall and 

 Clarke, I'al. Now York, VIII, I't. II, 1895, p. 80;— Tbirteeutli Auu. Rep. N. Y. 

 State Geologist, 1895, p. 775. 

 Goniocd'lia Hall, Fourteouth Kt-p. N. Y. State Cab. Nat. Hist., 1861, p. 101. 



Peiitagoiiia peersii Cozzciis=Peiitajj;oniti imisulcata. 



Peiitagonia unisulcata (Conrad). Oriskauy to Hamilton (Dev.). 



Atrypa iiiiiBuIiata Conrad, Fifth Ann. Rep. Ccol. Survey of N. Y., 1841, p. 56. — 



Hall, Filteeutb Rep. N. Y. State Cab. Nat. Hist., 1862, pi. 11, fig. 10. 

 Pentagouia peersii Cozzeus, Annals Lyceum Nat. Hist. N. Y., IV, 1846, p. 1.58, pi. 



10, fig. 3. 

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



p. 125. 

 Athyrisf unisulcata Billings, Canadian Journal, V, 1860, p. 279, ligs. 39-42. 

 Goniocd'lia uniangulata Hall, Fourteenth Rcji. N. Y. State Cab. Nat. Hist., 



1861, p. 101. 

 Meristella f unisulcata Hall, Fifteenth Re}). Ibidem, 1862, pi. 2, ligs. 17-25. 

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

 Meristella (Pentagonia) unisulcata varieties biplicata 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, tigs. 9-16. 

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



pi. 42, tigs. 22-32. 

 Loc. New York; county of Haldimaud and Bosauijuet, Ontario; Falls of Ohio. 



PENTAMERELLA Hall. Genotype Atrypa arata Conrad. 



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

 Pal. New York, IV, 1867, pp. 373, 375.— NettelrcJth, 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.). 



Atryjia 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, I'al. 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, M6m. Comitt' Gcologique de St. Pdtera- 



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

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



of Russia. 



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



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

 Luc. Anderson River, British America. 



Pentamerella (?) compressa Kinj^ueberg. Niagara (Sil.). 



Pentamerella compressa Ringueberg, Bull. Butfalo Soc. Nat. Sci., V, 1886, p. 15, 

 pi. 2, lig. 4. 



