100 LAND AND FRESH-WATER SHELLS OF N. A. [PART L 



Helix texasiana, Ppeiffek, Mon. Hel. Viv. I, 418 (excl. syn. and descr.) ; 



in Chemnitz, I, 85 (excl. syn., descr., and fig.). 

 Helix dorfeuilUana, Deshayes in Fer. I, 73 (excl. descr., syn., and fig.). 

 Helix troostiana, Pfeiffek, Mon. Hel. Viv. IV, 318, part. 

 Helix hazardi, Bland, Ann. N. Y. Lye. VI, 291, pi. ix, f. 27-30 (1858).— 



Pfeiffek, Mai. Blatt. 1859, 34.— W. G. Binney, Terr. Moll. IV, 84, 



pi. Ixxviii, f. 13. 

 Helix Jinitima, Deshayes in Fer. ? 

 Helicina plicata, DeKay, N. Y. Moll. 82 (1843). 

 Dadalockila hazardi, Tryon, Am. Journ. Conch. Ill, 68, pi. x, f. 27-29 



(18C7). 



Alabama (Tuscumbia), Kentucky (near Frankfort), Georgia, 

 and Tennessee (Cumberland Mts.). 



This shell may be distinguished from fastigans and troostiana 

 independently of the absence of the carina, by its smaller size, 

 and more particularly by the different form, relative size, and 

 position of the teeth. In those species the superior tooth on the 

 peristome is transverse, compressed, and larger than the inferior 

 one, from which it is separated by a " remarkable sinus," distinctly 

 visible on looking into the aperture ; the inferior tooth is obtuse. 

 Immediately behind the peristome, the position of the teeth is 

 marked by small shallow pits, giving the character to the last 

 whirl designated by Shuttleworth " scrobiculato-co7istrictus,^^ and 

 the striae run over the whirl up to the peristome. In H. hazardi, 

 the two teeth within the peristome are of the same character as 

 the superior one in fastigans and troostiana ; the inferior tooth 

 is however the largest, and so partially conceals the lower margin 

 of the superior one as to obstruct the view into the aperture, and 

 give no appearance of separation "by a remarkable sinus." 

 Both the teeth are more deeply seated than in the other species. 

 The nature of the scrobiculation behind the peristome in H. 

 hazardi alone sufficiently distinguishes it from its allies. The 

 space behind the peristome, and between it and the curved pit, 

 showing the seat of the superior tooth, is convex and smooth, the 

 striae not extending over it. 



This species has, in common with fastigans and troostiana, a 

 thin, brown, but more sparingly hirsute epidermis. I have 

 noticed the tubercle within the last whirl, near the aperture, in 

 fastigans and troostiana, but no such process exists in the species 

 now under consideration. In H. hazardi, the inferior tooth of 

 the peristome, at its inner end, is continued back within the 



