32 GASTROCOPTA, NORTH AMERICA, WEST INDIES. 



This is usually larger, more cylindrie, with 5 teeth, though 

 perfectly mature shells may have as few as 3 (figs. 19, 26) or 

 as many as 6 or 7 (figs. 16, 18, 21). It was originally de- 

 scribed from New Philadelphia, Ohio, but those figured are 

 from Alabama ; figs. 16, 17, 21 to 27 from around Wetumpka ; 

 18, 19 from Woodville ; 20 from Big Wills Valley, coll. by H. 

 H. Smith and H. E. Sargent. None of them has an infra- 

 parietal denticle. 



While this race seems to be tangibly differentiated in the 

 hill region of Alabama, specimens may be selected from other 

 lots of pentodon which could not possibly be distinguished if 

 mixed with the Alabama shells; for instance, fig. 31, Henry 

 Co., Indiana, and fig. 33, Des Moines, Iowa, both taken from 

 lots varying in shape from long and cylindrie to shorter and 

 more conic. 



The specimens of G. pentodan and varieties figured are 

 from the following localities : 



NOTE. The figures are all drawn to one scale (X 13.8), and any may be 

 accurately measured by plotting on paper a scale with the lines 13.8 mm. 

 apart; each space then representing 1 mm. Thus fig. 1 is 1.8 mm. long. 



PLATE 4, figures 1-4. Buckfield, Maine. John A. Allen. 

 No. 87304. 



5. Woodland, Maine. O. Nylander. No. 58249. 



6. Fairfield, Maine. J. H. Thompson. No. 58248. 



7. Westbrook, Maine. A. D. Brown (Bolles). No. 4263. 



8. Buckfield, Maine. John A. Allen. No. 87307. 



9. Cotype of P. floridana Dall. Alachua Co., Fla. W. H. 

 Ball. No. 58242. 



10. Mt. Taylor, south of Volusia, Fla. H. A. Pilsbry. -No. 

 72769. 



11. San Marcos, Texas. H. A. Pilsbry. No. 90454. 



12. Drift of Guadalupe River, 4 miles above New Braun- 

 fels, Texas. H. A. Pilsbry. No. 90456. 



13, 16, 17, 21-27. Wetumpka, Alabama. H. H. Smith. Nos. 

 87151, 90458, 90425. 



14, 15. Near Valley Head, Alabama. H. H. Smith. No. 

 90451. 



18, 19. Woodville, Alabama. H. E. Sargent. No. 66901. 



20. Big Wills Valley, 2 miles south of Valley Head, Ala- 

 bama. H. H. Smith. No. 90453. 



PLATE 5, figures 28, 29. Troy, New York. T. H. Aldrich. 

 No. 58251. 



