scHUCHEKT.] INDEX AND BIBLIOGRAPHY. 207 



Delthyris macropleura Conrad = Spirifer macropleura. 

 Delthyris medialis llall=Spirifer audaculus. 



Delthyris mesicostalis Hall. Ithaca and Chemunf? (Dev.). 



Delthyris mesacostalis Hall, Gcol. New York; Rep. Fourth Dist., 1843, ]>. 269, 



iig. 9. 

 Delthyris acuminata Hall (non 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 inesastrialis Hall = Spirifer mesistrialis. 

 Delthyris iniicronata Conrad = Spirifer jiennatus. 

 Delthyris niagarensis Conrad = Spirifer niagaraensis. 



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



Spirifer perlamellosa Hall, Tenth Rep. New York State Cai*. 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, fig. 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, 18.58, 



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 County, Missouri; Decatur County, Tennessee. 



Delthyris perlatus Conrad= Spirifer disjunctus. 



Delthyris prolata Yanuxem = 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. 

 ?Spirifer 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, fig. 5.— Hall, Second Ann. Rep. New York 



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



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

 Loc. Schoharie, Caledonia, etc., New Y'ork ; Columbus, Ohio; Falls of Ohio; 



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



Grand Greve, Gasp^. 



