scHucHERT] INDEX AND BIBLIOGRAPHY. 301 



Parastrophia ops (Billinjis). Auticosti (Sil.). 



Caiiiarella o})s Billings, Tal. Fossils, I, 18ti2, p. U8, tig. 128. 



F.oc. Anticosti. 



01)8. May bo ouly a variety of P. rever.sa. 



Parastrophia reversa (Hillings). Anticosti (Sil.). 



Pentamerus reversus Billings, Geol. Survey Canada; Keji. Progress for 1856, 

 1857, p. 295;— Canadian Jour., IV, 1859, p. 316. 



Brachymerus reversus Shaler, Bull. Mus. Conip. Zool., I, 18ti5, p. 69. 



Anastrojdiia reversa Miller, American Pal. Foss., 1877, p. 104. 



Parastrophia reversa Hall and Clarke, Pal. New York, VIII, Pt. II, 1895, pi. 63, 

 tigs. 8-14. 



Loc. Auticosti. 



Obs. Billings says this species is a large P. hemiplicata Hall. It appears, how- 

 ever, to be distiuet. .See P. ops Billings. 



Parastrophia scofieldi (Winchell and Scliuchert). Trenton (Ord.). 



Anastrophia ? scofieldi W. an>l S., Minnesota Geol. Survey, III, 1893, p. 383, pi. 



30, tigs. 24-28. 

 Loc. Near Cannon Falls, Minnesota. 



PARAZYGA Hall and Clarke. Genotype Atrypa hirsuta Hall. 



Parazyga Hall and Clarke, Pal. New York, VIII, Pt. II, 1893, p. 127;— Thirteenth 

 Ann. Rep. N. Y. State Geologist, 1895, p. 800. 



Parazyga dewejri Hall. Lower Helderberg- (Dev.). 



Waldheiuiia deweyi Hall, Tenth Kep. N. Y. State Cab. Nat. Hist., 1857, p. 89. 

 Trematospira (Rhynchospira) deweyi Hall, Pal. New York, III, 1889, p. 216, pi. 



36, tig. 3. 

 Parazyga deweyi Hall and Clarke, Ibidem, VIII, Pt. II, 18!»3, p. 128, tig. 112, pi. 



49, tigs. 40-46. 

 Loc. Albany and Schoharie counties, New York. 



Parazyga hirsuta Hall. Coruiferous and Hamilton (Dev.). 



Atrypa hirsuta Hall, Tenth Rep. N. Y. State Cab. Nat. Hist., 1857, p. 168. 



Trematospira hirsuta Hall, Thirteenth Rep. Ibidem, I860, p. 101; — Fourteenth 

 Rep. Ibidem, 1861, p. 101;— Fifteenth Rep. Ibidem, 1862, pi. 2, figs. 11-16;— 

 Pal. New York, IV, 1867, p. 274, pi. 45, tigs. 16-32.— Nettelroth, Kentucky 

 Fossil Shells, Mem. Kentucky Geol. Survey, 1889, p. 136, pi. 16, tigs. 15-19. 



Athyris ? chloe Billings, Canadian Jour., n. ser., V, 1860, p. 282, tigs. 45-47. 



Retzia chloe Billings, Geol. Canada, 1863, p. 385, fig. 419. 



Nucleospira indianensis Miller, Seventeenth Rep. State Geol. Indiana, 1892, p. 79, 

 pi. 13, tigs. 13-15. 



Parazyga hirsuta Hall and Clarke, Pal. New York, VIII, Pt. II, 1895, p. 128, tig. 

 Ill ; pi. 49, tigs. 28-39. 



Loc. New York; Thedford, Canada; Falls of Ohio; Bunker Hill, Indiana. 



Paterina Beecher=Iphidea. 



PATERULA Barraude. Genotype Pateriila bohemica Barrande. 



Paterula Barrande, Systeme Sil. du Centre de la Boh6me, V, 1879, p. 110.— Hall 

 and Clarke, Pal. New York, VIII, Pt. I, 1892, pp. 78, 165 ;— Eleventh Ann. 

 Rep. N. Y. State Geologist, 1894, ji. 242. 



Paterula amii n. sj). Calciferous (Ord.). 



Paterula species Hall and Clarke, VIII, Pt. I, p. 78, pi. 4K, tig. 1. 

 Loc. Quebec, Canada. 



