30 STROBILOPS, CANADA AND UNITED STATES. 



Falls (also on the Virginia side) (Pilsbry). Ohio: Kent (GT. 

 W. Dean) ; Garrettville (R. Walton). Illinois: Edwards Co. 

 (C. S. Hodgson); Sheridan (Ferriss). Tennessee: Cade's 

 Cove, Blount Co., 2000 ft. (Ferriss) ; Cumberland Plateau, 

 South Pittsburgh and Dove (H. H. Smith). North Carolina 

 Tuskeegee Mts., Graham Co. (Ferriss). South Carolina 

 Manning (W. Stone); Columbia (J. B. Clark). Florida 

 Manliattan, Lake Co. (Pilsbry and Johnson) ; Imri, Hamilton 

 Co. (E. B. Chope) ; Fort Lauderdale (C. T. Simpson) ; 

 Gainesville (J. B. Clark). Alabama: many places throughout 

 the northern half of the state (H. H. Smith, H. E. Sargent). 



Strobilops lahyrinthica streheli Pfr., Pilsbry, Nautilus VII,. 

 Sept. 1893, p. 57 ; Proc. A. N. S. Phila. 1900, p. 133 ; 1902, p. 

 429 (North Carolina). — Ferriss, Naut. XIV, p. 56 (Cade's 

 Cove, Tenn.). Not Helix streheli Pfeiffer. — Strobilops lahy- 

 rinthica (Say) Walker, 111. Cat. Moll. Mich., 1906, p. 506,_f. 

 119 (not the synonymy) (Michigan). — StrohiUi, lahyrinthica 

 D.U.L, Proc. U. S. Nat. Mus. VIII, 1885, p. 262 (Archer, Fla.). 

 — Strohilops cenea Pilsbry, Nautilus XL, Oct. 1926, p. 69. 



This species is well characterized by being more depressed 

 than others of its region, with a decidedly angular periphery, 

 the base flattened just below the angle ; by the fine, thin ribs, 

 the dark color and the wider umbilicus ; moreover, there is no 

 internal fold above the periphery. It was recognized as dis- 

 tinct over thirty years ago, but at that time it was confused 

 with the Mexican species 8. streheli Pfr., which differs by its 

 far narrower umbilicus. 



8. conea is often found associated with 8. lahyrinthica, these 

 two being the most abundant and widely distributed species 

 of 8trohilops in the states east of the Mississippi River. West 

 of the Mississippi 8. ccnea has been found only in Arkansas 

 and Louisiana. It is the common Strobilops of the Gulf 

 coastal plain. 



4a. 8trohilops ccnea form ynicromphala, new form. PL 9, figs. 

 8, 9. 

 Lighter colored than 8. cenea; between cinnamon and cinna- 

 mon-brown; outlines of sjpire more convex; umbilicus nar- 



