1140 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Scenella cassinensis — Continued. 



Scenella conica Ulrich and Scofield (not Whiteaves, 1894), Geol. Minnesota, 3, 



pt. 2, 1897, p. 826 (gen. ref.). 

 Canadian (Beekmantown): Fort Cassin, Vermont. 



Scenella compressa Ulrich and Scofield. 



Scenella compressa Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 1897, p. 840, 



pi. 61, figs. 38-41. 

 Conchopeltis compressa Miller, N. A. Geol. Pal., 1897, p. 7G6 (gen. ref.). 

 Black River (Platteville): Minneapolis, Minnesota. 

 Holotype— Cat. No. 45988, U.S.N. M. 



Scenella conica Ulrich and Scofield. Scenella cassinensis. 



Scenella conica Whiteaves. 



Scenella conica Whiteaves, Pal. Foss., Geol. Surv. Canada, 3, pt. 1, 1884, p. 32, 

 pi. 5, figs. 2, 2a.— Miller, N. A. Geol. Pal., 1889, p. 392, fig. 648.— Lesley, 

 Geol. Surv. Pennsylvania, Rep. P 4, 1890, p. 933, figs.— Whiteaves, Pal. 

 Foss., Geol. Surv. Canada, pt. 2, 1895, p. 69. 

 Niagaran (Guelph): Durham, Ontario. 



Scenella magnifica Ulrich and Scofield. 



Scenella magnifica Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 1897, p. 839, pi. 



82, figs. 7-9. 

 Black River (Platteville): Cannon Falls, Minnesota. 

 Plostotype— Cat. No. 45989, U.S.N.M. 



Scenella inontrealensis (Billings). 



Metoptoma Montrealensis Billings, Pal. Foss., 1, 1865, p. 394, fig. 371. 



Scenella montrealensis Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 1897, p. 



838.— Raymond, Ann. Carnegie Mus., 4, 1908, p. 173, pi. 46, figs. 9, 10; pi. 



55, fig. 1.— Grabau and Shimer, N. A. Index Fossils, 1, 1909, p. 608, fig. 812, 



813. 

 Chazyan (Day Point — Valcour): Montreal, Quebec; etc.; Chazy, etc., New York; 



Isle La Motte, Vermont. 

 Plesiotype— Cat. No. 53633, U.S.N.M. 



Scenella obtusa (Sardeson). 



Conchopeltis (Metoptoma) obtusa Sardeson, Bull. Minnesota Acad. Nat. Sci., 3, 



1892, p. 336, pi. 6, fig. 17. 

 Scenella obtusa Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 1897, p. 841, pi. 



82, fig. 10. 

 Black River (Decorah): Minneapolis, Minnesota. 



Scenella orithyia (Billings). 



Metoptoma orithyia Billings, Pal. Foss., 1, Geol. Surv. Canada, p. 38, fig. 40a, b 



(adv. sheets, 1862); Geol. Canada, Geol. Surv. Canada, 1863, p. 276, fig. 



282a, b.— Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 402, figs.— 



Sardeson, Jour. Geol., 11, 1903, p. 479, fig. 7. 

 Canadian (Beekmantown) : Phillipsburg, Quebec. 



Scenella pretonsa Raymond. 



Scenella pretensa Raymond, Amer. Jour. Sci., 4th ser., 20, 1905, p. 375; Ann. 



Carnegie Mus., 4, 1908, p. 173, pi. 46, figs. 11-13. 

 Chazyan: Chazy, New York (Day Point); Lenoir, Tennessee (Lenoir). 



