♦ [ xxvii. ] 



S. fatigiata, Binney, Boston Jour. Nat. Hist., 

 T). 388, (Part. Excl. Syn.,) t. 19, f. 3, 

 1840. 

 Binney, Terr. MoUusks, ii., p. 193, (Part. 

 Excl. Syn.,) 1852. 



E. pUcata, Binney, 1. c. iii., t. 39, f. 2, 1857. No. 17. 



Pig. 20, 21. D. DoRFEUiLLiANA, Lea. Trans. Amer. 

 Philos. Soc, vi., p. 107, t. 24, f. 118, 

 1838. 

 Bland, Annals N. Y. Lye, vi., p. 294, t. 9, 



f, 24—26, Feb., 1858. 

 W. G. Binney, 1. c. iv., p. 86, t. 78, f. 2, 14, 

 1859. . 

 H. fatigiata, Binney, Bost. Jour. Nat. Hist., 

 iii., p. 388, (Part. Excl. Syn. and Eig.,) 

 1840. 

 Binney, Terrest. Moll., ii., p. 193, (Part. 



Excl. Syn. et Eig.,) 1851. No. 14. 



" 22, 23, 26. D. fastigans, L. W. Sav. Bland, 

 Ann. N. Y. Lye, vii., 1859. 

 S. fatigiata, Say, Disseminator of Useful 

 Knowledge, ii., p. 229, 1829. 

 Binney, 1. c. ii., p. 193, (excl. syn., t. 39, f. 



4, 1851. 

 Bland, 1. c. vi., p. 283, Feb., 1858. 

 W. G. Binney, Terr. Mollusks, iv., p. 82, 

 1859. 

 H. Texasia7ia, var. B., Chemnitz, edit. 2, p. 

 86, (excl. desc. syn. and fig.) 1846. 

 Pfeiffer^ Monog. Helic, Viv. i.. No. 1086, 

 (excl. desc. et syn.,) 1848. 

 IT. Dorfeuilliana, Deshayes, Ferussac, Hist. 

 Nat. i., p. 73, t. 69, D. f. 3, (excl. syn). 



IT. Texasiana, Deshayes, Id., p. 74, (excl. 



desc. syn. and fig.) No. 16. 



" 24, 44. D. HiNDSi, Pfeiffer. Proc. Zool. Soc, p. 

 132, 1845. 

 Binney, Terr. Moll., iii., p. 17, 1857. 

 W. G. Binney, 1. c. iv., p. 92, t. 78, f. 5, 6, 



8, 1859. ■ No. 7. 



