28 STROBILOPS, CANADA AND UNITED STATES. 



New Jersey and west of the Alleghanies to northern Alabama 

 and Oklahoma. Localities of specimens seen follow. Massa- 

 chusetts: New Bedford (J. H. Thomson). New York: Syra- 

 cuse, Pleistocene (Burnett Smith) ; Poughkeepsie (G. Van 

 Ingen) ; Upper Red Hook, Duchess Co. (W. S. Teator, type 

 loc.) ; Staten Island (E. W. Hubbard, T. Bland) . New Jersey : 

 Wliite Pond, Warren Co. (Pilsbry). Ohio: Kent (G. W. 

 Dean). Michigan: Pine Lake, Oakland Co. (B. Walker), 

 Minnesota: Dallas Lake, Wright Co. (H, E. Sargent). Illi- 

 nois: Athens (E. Hall). 



Strobilops affinis Pilsbry, Nautilus VII, Sept. 1893, p. 57. 

 —Walker, Illustr. Cat. Moll. Michigan, 1906, p. 507, f. 121 

 southern Michigan, not reported north of Saginaw-Grand val- 

 ley). — Daniels, Nautilus XIX, p. 63 (Posey Co., Ind.). — 

 Ferriss, Naut, XX, p. 17 (Oklahoma City). — Nylander, 

 Naut. XXII, p. 143 (Aroostook Co., Me.). — H.wna, Naut. 

 XXIII, p. 95 (Douglas Co., Kan.).— Sterki, Naut. XXV, p. 

 116 (Glenrose, Texas) .—Hinkley, Naut. XXXIII, p. 14 (Du- 

 bois, 111.). — Sterki, Prelim. Cat. Land- and Fresh-water Moll, 

 of Ohio, Proc. Ohio State Acad. Sci. IV, 1907, p. 378 (Sum- 

 mit Co.). — Zetek, Trans. Illinois State Acad. Sci. XI, 1918, 

 p. 170 (Urbana, 111., under old logs). — Chadwick, Notes ou 

 Wisconsin Moll., Bull. Wisconsin Nat. Hist. Soc, IV, 1906, p. 

 75 (Lake bluffs south of Whitefish Bay; Menomonee valley; 

 Cudahy; Mishicot, Manitowoc Co., under conifers). — Daniels, 

 27tli Ann. Rep. Dept. Geol. and Nat. Resources of Indiana, 

 1902, p. 586 (near Lake James, Steuben Co.; Tippecanoe 

 Lake, Kosciusko Co, ; Mitchell, La^\Tenceburg, Wyandotte and 

 Huntingburg in southern Indiana). — G. H. Clapp, in litt, : 

 Thayer, Kansas (Ferriss) ; Evanston, 111, (Baker) ; Culver, 

 Ind, (Daniels) ; Cowan, Tenn, and Stevenson, Ala, (H, H, 

 Smith), — F, C. Baker, Life of the Pleistocene, Univ. Illinois, 

 Bull. XVII, 1920, p. 388 (Sangemon Pleistocene to Recent). 



This shell is somewhat larger than 8. lahyrinthica, thinner, 

 with the infraparietal lamella more deeply immersed and the 

 baso-palatal folds less unequal, all being rather short and 

 fonning a regular curve across the base and up the outer wall. 

 The outlines of the spire are some^^hat less convex than in 

 8. IdbyrintJiica but more convex than in 8. miea. 



