EASTERN PROVINCE INTERIOR REGION SPECIES. 273 



Steiiotrcnia spiiiosiiin, Lea. 



Shell imperforate, lenticular, with the upper surface much flattened, 

 acutely carinated ; epidermis dark chestnut-color, with minute, hair- 

 like processes lying flat upon the whorls in the direction of fjg. 289.* 

 their lines of growth, striate ; whorls 6, of nearly uniform 

 width, and decreasing very gradually from the aperture to 

 the spire ; suture distinct, slightly raised ; aperture very 

 narrow ; peristome yellowish-white, near its junction with ^- ^pinosum. 

 the body-whorl thickened, angulated, and slightly reflected, with a 

 median cleft; parietal wall with a long, yellowish, narrow, projecting 

 tooth, extending from the umbilical axis to the angle of the peristome 

 and parallel with its thickened edge ; base convex, with the umbilical 

 region slightly indented ; within the shell, springing from the axis, is 

 a transverse, curved, white tubercle. Greatest diameter 14, lesser 

 IS-""'; height, e--. 



CaracoUa spinoaa, Lea, Am. Phil. Trans., iv, 104, pi. xv, fig. 35; Obs., i, 114 (1834). 



Helix mnnosa, Binney, Bost. Journ. Nat. Hist., iii, 367, pi. xi, fig. 2 (1840) ; Terr. Moll., 

 ii, 153, pi. xliv, fig. 1, excl. syn. — Pfeiffer, Mon. Hel. Viv., i, 421 ; in Chem- 

 nitz, etl. 2,i, 375, pi. Ixv.figs. 15 17 (1849).— De Kay, N. Y. Moll., 47, pi. v, 

 fig. 114 (1843).— Reeve, Con. Icon., G85 (1852).— W. G. Binney, Terr. Moll., 

 iv, 65; L. «fc Fr.-W. Sh., i, 113, figs. 189, 190 (1869). 



Stenotrema spinosa, Tryon, Am. Journ. Conch., iii, 58 (1867).— W. G. Binney, Terr. 

 Moll., V, 291. 



A species of the Cumberland Subregion, common in East Tennessee, 

 ranging into Alabama and Georgia. 



Fig. 289 shows the iuternal tubercle. 



Animal light colored, head and eye-peduncles darker, foot narrow, 

 translucent, length little more than the diameter of the shell, pointed 

 at the end. Eyes black, eye-peduncles G""" long. Shell carried hori- 

 zont'illy on the baik. 



Jaw as usual, wi;h 8 ribs. 



Lingual membrane (Terr. Moll., V, Plate VII, Fig. B) with 27-1-27 

 teeth; 9 perfect laterals; the eleventh tooth has a bifid inner cutting 

 point. 



Plate XIV, Fig. H, of Terr. Moll., V, represents the genital system of 

 this species. The penis sac is very long, attenuated at either end, 

 greatly swollen at the median third of its length. The genital bladder 

 is oval, on a short duct. 



* Tlie hirsute character of the epidermis is not shown in the figure. 

 1749_I>„]1. o.S 18 



