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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 trifle 

 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 eontraeostae 



"Smaller than var. diabloensis, but of the same depressed 



