34 Calvin Goodrich 



imens appear which are wholly or nearly smooth. The nodules are not con- 

 stant, and when they are present they vary in strength. Judging from the 

 shells examined, color bands or lines are tending in this species to become 

 obsolete. Of ii specimens in one lot, 7 were without bands or lines, 3 had 

 fine lines broken or continuous, i had an arrangement of four very dark 

 continuous bands. The type specimen lacks the heavy callous at the top of 

 the columella, present in some of the material which evidently is older. 

 The columella is ordinarily strong, broad, rounded, tending to become 

 slightly liattened on the outer surface and on the edges near the center. 

 Of the II specimens of the one lot mentioned above, the columella was 

 white in i, purple in 2 and reddish or salmon in the case of 8. The outer 

 lip is sinuous more often than not. 



Two forms of operculum were observed, one which is of the griffithiana 

 type and the other suggesting relationship with the picta group. 



Flexiiosa is much more robust than griffithiana and the development of 

 fine color lines is foreign to that species. Considering size, color lines, 

 opercula and general shell texture and sculpture one might be inclined to 

 think the form a hybrid of griffithiana and picta. Yet the absence of evi- 

 dences of hybridization elsewhere in the genus Anculosa discourages this 

 idea. 



Measurements : 



All from Wetumpka. 



Anculosa choccoloccoensis H. H. Smith, new species 



Fig. 14 



Shells: Obtusely ovate, not heavy, lines of growth rather coarse; spiral striae 

 over parts of the shell, undulate, obscure, not continuous; rest scars prominent. 

 Apex eroded. Suture impressed, a little irregular. Color buckthorn brovi^n ; shining; 

 epidermis showing four interrupted bands, the basal band very faint; bands appearing 

 in aperture as lines of dark dots or oblong markings. Columella reddish, strong, 

 rather heavy in the center, regularly curved, the outer edge flattened and nearly at 

 right angles to the body whorl; at the base projecting slightly over the epidermis. 

 Aperture ovate, peristome very thin. 



Operculum: Thin, reddish, 7^ mm. in altitude, 334 mm. in diameter. The left 

 margin is nearly straight; right margin curved, firm; basal margin broadly rounded; 

 apex acute. Lines of growth fine. Nucleus indented, located on left margin close 

 to the base. Whorls three, closely coiled. The area of attachment to the foot is 

 narrow, elliptical. 



Measurements: Altitude, 13 J4 mm.; diameter, 11^4 mm. Aperture — altitude, 6>i 

 mm. ; diameter, sVi mm. 



Type locality: Choccolocco Creek at Jackson Shoals, Talladega County, Alabama. 

 Collected by Herbert H. Smith, September, 1905. 



Type in Museum of Zoology, University of Michigan; paratypes in the Alabama 

 Museum of Natural History. 



