scHucHEET.] INDEX AND BIBLEOGKAPHY. 207 



Delthyris macropleura Conrad = Spirifer macropleura. 

 Delthyris medialis Hall-=Spirifer audaculus. 



Delthyris mesicostalis Hall. Ithaca and Chemung (Dev.). 



Delthyris mesacostalis Hall, Geol. New York; Eep. Fourth Dist., 1843, p. 269, 



fig. 9. 

 Delthyris acuminata Hall (uon Conrad), Ibidem, 1843, p. 270, fig. 5. 

 Spirifera mesacostalis Hall, Pal. New York, IV, 1867, p. 240, pi. 40, figs. 1-3. 

 Spirifera mesacostalis? Hall, Second Ann. Rep. New York State Geol., 1883, pi. 59, 



figs. 32-34. 

 Spirifera mesacostalis var. acuminata Hall, Ibidem, 1883, figs. 27-31. 

 Spirifer mesacostalis Hall and Clarke, Pal. New York, VIII, Pt. II, 1895, pi. 34, 



figs. 32-34.— Kindle, Bull. American Pal., 6, 1896, p. 35. 

 Loc. Ithaca, Philipsburg, Olean, etc., New York. 



Delthyris mesastrialis Hall = Spirifer mesistrialis. 



Delthyris mncronata Conrad = Spirifer pennatus. 



Delthyris niagarensis Conrad = Spirifer niagaraensis. 



Delthyris perlamellosa (Hall). Lower Helderberg (Dev.). 



Spirifer perlamellosa Hall, Tenth Rep. New York State Cab. Nat. Hist., 1857, p. 



57, figs, 1-5 on p. 58;— Pal. New York, III, 1859, p. 201, pi. 26, figs. 1, 2.— 



Billings, Geol. Canada, 1863, p. 957, tig. 455.— Hall and Clarke, Pal. New 



York, VIII, Pt. II, 1895, pi. 35, figs. 7-13. 

 Delthyris macropleura Rogers (non Conrad), Geol. Pennsylvania, II, Pt. II, 1858, 



p. 825, fig. 643. 

 Spirifera perlamellosa Meek and Worthen, Geol. Survey Illinois, III, 1868, p. 384, 



pi. 7, fig. 9.— Hall, Second Ann. Rep. New York State Geol., 1883, pi. 60, 



figs. 5-13. 

 Spirifera perlamellosa? Keyes, Geol. Survey Missouri, V, 1895, p. 77. 

 Loc. Schoharie, Carlisle, etc.. New York; Cumberland, Maryland; Pennsylvania; 



Square Lake, Maine; Perry Couuty, Missouri; Decatur County, Tennessee. 



Delthyris perlatus Conrad = Spirifer disjunctus. 

 Delthyris i^rolata Vanuxein = Spirifer disjunctus. 

 Delthyris prora Conrad = Spirifer acuminatus. 

 Delthyris radiatus Hall = Spirifer radiatus. 



Delthyris raricosta Conrad. Upper Helderberg (Dev.). 



Delthyris raricosta Conrad, Jour. Acad. Nat. Sci. Philadelphia, VIII, 1842, p. 262, 



pi. 14, fig. 18. 

 Delthyris undulatus Vanuxem, Geol. New York; Rep. Third Dist., 1842, p. 132, 



fig. 3. 

 Spirifer raricosta Billings, Canadian .lour., VI, 1861, p 258, figs. 71-73 on p. 259; — 



Geol. Canada, 1863, p. 372, fig. 392.— Walcott, Mon. U. S. Geol. Survey, VIII, 



1884, p. 135, pi. 4, fig. 2; pi. 14, fig. 12.— Hall and Clarke, Pal. New York, 



VIII, Pt. II, 1895, pi. 35, figs. 5, 6, 14-17. 

 fSpirifer hesione Billings, Proc. Portland Soc. Nat. Hist., 1863, p. 117, pi. 3, 



fig. 17. 

 Spirifera raricosta Hall, Pal. New York, IV, 1867, p. 192, pi. 27, figs. 30-34; 



pi. 30, figs. 1-9.— Nicholson, Pal. Prov. Ontario, 1873, p. 82.— Billings, Pal. 



Fossils, II, 1874, p. 47, pi. 3A, tig. 5. — Hall, Second Ann. Rep. New York 



State Geol., 1883, pi. 60, figs. 14-17.— Nettelroth, Kentucky Fossil Shells, 



Mem. Kentucky Geol. Survey, 1889, p. 128, pi. 17, figs. 38-42. 

 Loc. Schoharie, Caledonia, etc.. New York; Columbus, Ohio; Falls of Ohio; 



Eureka district, Nevada; Port Colborne, Ontario; Square Lake, Maine; 



Grand Greve, Gasp6. 



