146 



A MANUAL OF AMERICAN LAND SHELLS. 



The figure is a fac-simile of one of those of Desliayes. It represents 

 an luinsually large individual, with two revolving red bands. The 

 form usually met with is also figured. (Fig. 125.) 



A. scqtioicola. 



Arioiita. sequoicoia, J. G. Coopek. 



Shell uuibilicated, globosely depressed, rather thiek, of a light chest- 

 Fu;. 12G. nut-color, lighter below, with a band of darker color 



revolving above the middle of the body-whorl, be- 

 tween two equal bands of white; surface but 

 slightly roughened by coarse, irregular wrinkles of 

 growth, often decussated with coarse, indented re- 

 volving lines, the upper whorls with prominent, 

 crowded, minute, isolated granulations, running in 

 ridges or series in an oblique direction to the wrin- 

 kles of growth ; spire obtusely conic; whorls 6, but 

 slightly convex, the last more globose, slightly de- 

 scending before ; umbilicus moderate, conical ; 

 aperture very oblique, subcircular; jieristome white, thickened, ends 

 approaching, its columellar portion widened and reflected, partially 

 covering the umbilicus. Greater diameter 27, lesser 21""" ; height, 12'""'. 



-Helix neqitoicola, J. G. Cooper, Proc. Cal. Acad., iii, 259 (lb66). — W. G. Binney, L. & 



Fr.-W. Sh., i, 172, fig. 300 (18G9). 

 Afilaja scquoicolfl, Tryon, Am. Jourii. Conch., iii, IGO, pi. xi, tig. 27 (1867). 

 Arionla sequoietla, W. G. BiNNEY', Terr. Moll., v, 367. 



In the California Eegion, from Santa Cruz County, California, 20 

 miles north. A coast species. 

 Animal dark bluish-slate. Epiphragm as usual in the genus. 

 In form and coloring much allied to A. Mormonum, but readily dis- 

 riG. 127. tinguished by its peculiar sculpturing from that and 



all other aUied species. (See Fig. 127.) It may be 

 hirsute when in a perfect condition. 



The shell described and figured was received from 

 Dr. Cooper. 



Jaw as usual ; 4 to 6 ribs. 



Lingual membrane (Terr. Moll., V, Plate IX, Fig. 

 Sculpturing of ^. se,uoi. j^ ^^.j^^^ 4C-1-4G tccth, 18 laterals, the nineteenth 



tooth having a split inner cutting point. I can detect no outer cusp 

 and cutting point on any of the laterals, 



