. Bulletin - United States National Museum. Science. 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-w
. Bulletin - United States National Museum. Science. 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. 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 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
Size: 1641px × 1523px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
