BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 1339 



ZOPHOCRINUS Miller. Genotype: Z. howardi Miller. 



Zophocrinus Miller, 17th Ann. Rep. Indiana Dep. Geol. Nat. Res., 1892, p. 642 

 (adv. sheets, 1891, p. 32); N. A. Geol. Pal., 1st App., 1892, p. 683. Weller, 

 Bull. Chicago Acad. Sci., Nat. Hist. Surv., 4, pt. 1, 1900, p. 152, fig. 57. 

 Bather, Treatise on Zool., pt. 3, Echinoderma, London, 1900, p. 151, fig. 63. 

 Slocom, Field Columbian Mtis., 2, Geol. Ser., 1908, p. 284, fig. 5. Grabau and 

 Shimer, N. A. Index Fossils, 2, 1910, p. 474. Springer, Zittel-Eastman Textb. 

 Pal., 2d ed., 1913, p. 158. 



Zophocrinus globosus Slocom. 



Zophocrinus globosus Slocom, Field Columbian Mus., GeoJ. Ser., 2, 1908, p. 285, 



pi. 85, figs. 15-19. 

 Niagaran (Racine): Drainage Canal, near Lemont, Illinois. 



Zophocrinus howardi Miller. 



Zophocrinus howardi Miller, 17th Ann. Rep. Indiana Dep. Geol. Nat. Res., 1892, 

 p. 643, pi. 6, figs. 26-28 (adv. sheets, 1891, p. 33); N. A. Geol. Pal., 1st 

 App., 1892, p. 683, fig. 1254. Weller, Bull. Chicago Acad. Sci., Nat. Hist. 

 Surv., 4, pt. 1, 1900, p. 152, pi. 15, fig. 13. Bather, Treatise on Zool., pt. 3, 

 Echinoderma, London, 1900, p. 151, fig. 63. Grabau and Shimer, N. A. 

 Index Fossils, 2, 1910, p. 474, fig. 1785. 

 Niagaran: St. Paul, Minnesota (Laurel); Lemfont, Illinois (Racine). 



Zophocrinus pyriformis Slocom. 



Zophocrinus pyriformis Slocom, Field Columbian Mus., Geol. Ser., 2, 1908, p. 285, 



pi. 85, figs. 12-14. 

 Niagaran (Racine): Romeo, Illinois. 



ZYGOSPIRA Hall. Genotype: Atrypa modesta Hall. 



Stenpcisma Hall (not Conrad), Pal. New York, 1, 1847, p. 142. Meek and Hayden, 

 Pal. Upper Missouri, Smiths. Cont. to Knowl., 14, 1864, p. 16. 



Zygospira Hall, loth Rep. New York State Cab. Nat. Hist. , 1862, p. 154, figs. 1-2. 

 Billings, Canadian Nat. Geol., 7, 1862, p. 393. Hall, 20th Rep. New York 

 State Cab. Nat. Hist., 1867, p. 267. Meek, Geol. Surv. Illinois, 3, 1868, p. 

 377. Miller, Cincinnati Quart. Jour. Sci., 2, 1875, p. 58. Zittel, Handb. Pal., 

 1, 1880, p. 688. Davidson, Suppl. British Sil. Brach., Pal. Soc., 1882, pp. 

 86, 119, 122. Beecher, Amer. Jour. Sci., 3d ser., 44, 1892, p. 152. Winchell 

 and Schuchert, Geol. Minnesota, 3, 1893, p. 465. Beecher and Schuchert, 

 Biol. Soc. Washington, 8, 1893, pp. 71-82. Hall and Clarke, Pal. New York, 

 8, pt. 2, 1893, p. 154. Beecher, Bull. IT. S. Geol. Surv., 87, 1897, pp. 110, 

 111. Grabau and Shimer, N. A. Index Fossils, 1, 1907, p. 307. Cumings, 

 32d Ann. Rep. Dep. Geol. Nat. Res. Indiana, 1908, p. 896. Schuchert, Zittel- 

 Eastman Textb. Pal., 1900, p. 333; 2d ed., 1913, p. 408. 



Anazyga Davidson, Suppl. British Sil. Brach., Pal. Soc., 1882, p. 128. Miller, 

 N. A. Geol. Pal., 1889, p. 334. (Genotype: Atrypa recurvirostra Hall.) 



Ilallina Winchell and Schuchert, Prel. Desc. Amer. Geol., 9, 1892, pp. 291, 292. 

 Miller, N. A. Geol. Pal., 2d App., 1897, p. 760. (Genotype: H. saffordi Win- 

 chell and Schuchert.) 



Protozyga Hall and Clarke, Pal. New York, 8, pt. 2, 1893, p. 151; 13th Ann. Rep. 

 New York State Geol., 1895, pp. 809, 810, 812. (Genotype: Atrypa exigua 

 Hall.) 



Orthonomsea Hall, Note in Cont. Pal. New York, 1859 (not defined). Hall and 

 Clarke, 47th Rep. New York State Mus., 1894, p. 1008. (Genotype: 0. erratica 

 Hall.) 

 84243 Bull. 92 vol 215 40 



