66 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Arctinurus boltoni Continued. 



Platynotus boltoni Conrad, Rep. New York State Geol Surv., 1838, p. 118. 

 Hall, Geol. New York, pt. 4, Tab. Org. Rem., 1843, p. 19, fig. 1. 



Lickas boltoni Hall, Pal. New York, 2, 1852, p. 311, pi. 69; pi. 70, figs, la-g, j-1 

 (not figs. lh-i). Gebhgtrd, 8th Rep. New York State Cab. Nat. Hist., 1855, 

 p. 29, pi. 69, fig. 1. Meek and Worthen, Geol. Surv. Illinois, 6, 1875, p. 508, 

 pi. 25, fig. 5. Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 336, fig. 

 Clarke, 10th Rep. State Geol. New York, 1891, p. 88; 44th Rep. New York 

 State Mus., 1892, p. 112. Keyes, Missouri Geol. Surv., 4, 1894, p. 226. 

 Grabau, Bull. New York State Mus., 45, 1901, p. 225, pi. 17. 



Lichas (Oncholichas) Boltoni Schmidt, Mem. 1'Acad. Imp. Sci. St. Petersburg, 

 7th ser., 33, 1885, p. 31. 



Plerolichas boltoni Gurich, Neues Jahrb. f. Min., Geol. Pal., Beilage-Band, 14, 

 1901, p. 528, pi. 20, fig. 2. 



Clinton (Rochester): Lockport, Rochester, etc., New York; Grimsby, Hamilton, 

 etc., Ontario. 



Plastotype.Gzt. No. 4888, U.S.N.M. 



Arctinurus chicagoensis Weller. 



Arctinurus chicagoensis Weller, Bull. Chicago Acad. Sci., Nat. Hist. Surv., 4, pt. 



2, 1907, p. 248, pi. 23, figs. 7, 8; pi. 22, fig. 14. 

 Niagaran (Racine): Hawthorne, Illinois. 



Arctinurus harrisi (Miller). 



Lichas harrisi Miller, Jour. Cincinnati Soc. Nat. Hist., 1, 1878, p. 106, pi. 3, fig. 9. 

 Lichas (Platynotus) harrisi Clarke, Geol. Minnesota, 3, pt. 2, 1894, p. 753. 

 Richmond (Liberty): Near Waynesville, Ohio. 

 HolotypeC&t. No. 40690, U.S.N.M. 



Arctinurus nereus (Hall). 



Lichas boltoni Hall, Pal. New York, 2, 1852, p. 311, pi. 70, figs. Ih-i (not figs. 



la-g, j-1). 

 Lichas nereus Hall, 16th Rep. New York State Cab. Nat. Hist., 1863, p. 226. 



Van Ingen, School of Mines Quart., 23, 1901, p. 64, pi. figs. 14-26. 

 Arctinurus nereus Grabau and Shimer, N. A. Index Fossils, 2, 1910, p. 308. 

 Niagaran: Lockport, New York (Rochester); St. Clair Springs, Independence 



County, Arkansas (St. Clair). 



Arctinurus obvius (Hall). 



Lichas obvius Hall, 20th Rep. New York State Cab. Nat. Hist,, 1870 (rev. ed.), 



p. 424, pi. 25, fig. 10. 

 Lichas (Oncholichas) obvia Schmidt, Mem. 1'Acad. Imp. Sci. St. Petersburg, 7th 



ser., 33, 1885, p. 31. 

 Niagaran: Lyons, Iowa. 



Arctinurus occidentalis (Hall). 



Lichas boltoni Worthen and Meek, Geol. Surv. Illinois, 6, 1875, p. 508, pi. 25, fig. 5. 



Lichas boltoni var. occidentalis Hall, Trans. Albany Inst., 4, 1864, p. 223; 28th 

 Rep. New York State Mus. Nat. Hist. (doc. ed.), 1877, pi. 34, figs. 8-11; 

 (mus. ed.), 1879, p. 198, pi. 34, figs. 8-11; llth Rep. Dep. Geol. Nat. Hist, 

 Indiana, 1882, p. 344, pi. 36, figs. 8-11, 12. Lesley, Geol. Surv. Pennsylva- 

 nia, Rep. P 4, 1889, p. 335, fig. Foerste, Proc. Boston Soc. Nat. Hist., 24, 

 1890, p. 272. 



Arctinurus occidentalis Weller, Bull. Chicago Acad. Sci., Nat. Hist., Surv., 4, 

 pt. 2, 1907, p. 247, pi. 20, figs. 10-12. Grabau and Shimer, N. A. Index Fos- 

 sils, 2, 1910, p. 308, fig. 1621a. 



