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1676 Vitrea Johnsoni ~~ 
“Shell small, pale waxen white or translucent, of 3% whorls, 
rather rapidly enlarging, smooth except for delicate radial lines 
of growth which are occasionally visible; suture distinct, slightly 
impressed; spire hardly elevated but not flattened; periphery 
rounded, base convex, imperforate, the pillar lip strongly reflected 
close to the axis; aperture semilunar, sharp edged, the peristome 
hardly flexuous, the upper edge a little in advance of the lower; 
resting stages indicated internally by 1 or 2 narrow whitish 
streaks where the shell is slightly thickened, but which do not 
project internally. Height of shell 1, major diam. 2, minor diam. 
1.5 mm.’”’—Dall, Nautilus 9:27. Named in honor of Prof. O. B. 
Johnson. 
Type locality: —near Seattle, Wash. (P. B. Randolph). 
1677 Vitrea pugetensis 
Near Seattle, Wash. (P. B. Randolph). 
1678 Vitrea subrupicola 
Clinton’s Cave, Utah (Dr. Packard). 
1679 Variety spelea Dall, Nautilus 9:27. 
Cave City, Calaveras Co., Cal. (Hemphill). Larger than 
typical form. 
1680 Planorbis centervillensis Tryon. 
Shell small, of 4 rather elevated whorls, well rounded, slightly 
angled on the periphery, suture well impressed, umbilicus narrow 
and deep; aperture slightly dilated, quite oblique. Diam. 4, alt. 
1.5 mm. 
Type locality:—Centerville, Cal. Widely diffused on the Pa- 
cific coast, often confused with vermicularis Gld. 
1681 Drake, Mrs. Marie: 
Marine shells of Puget Sound. Nautilus 9:38. 
1682 Planorbis callioglyptus 
‘Shell thin, yellowish corneous. Upper side flat, only a trifie 
concave in the middle; lower side convex; periphery very bluntly 
indistinctly angular, and midway between periphery and suture 
there is a slight angle; but both angles are obsolete at aperture; 
base often spirally malleated. Surface with a beautiful sculpture 
of fine spiral incised lines, crenulated by fine growth-lines. 
Whorls nearly 4. Umbilicus nearly a third the shell’s diameter, 
deep and funnel-shaped, its edge bluntly angular. Aperture ovate 
truncate, moderately oblique. Lip not thickened inside. Alt. 3, 
diam 8 mm.’’—E. G. Vanatta, Nautilus 9:54. 
Type locality:—Freeport, Wash. (Hemphill). 
1683 Planorbis opercularis oregonensis 
“Shell light yellowish, opaque. Upper surface flattened, slight- 
ly convex, the apex sunken; periphery keeled with a slight groove 
above the keel. Surface finely spirally striated. Umbilicus 
rather small and deep, its edge slightly angular. Aperture ap- 
proaching vertical, lip thickened within. Alt. 2, diam, 6 mm.’— 
E. E. Vanatta, Nautilus 9:54. 
Type localities: —Salem and Portland, Oregon. 
1684 Epiph. californiensis contracostze 
“Smaller than var. diabloensis, but of the same depressed 
