5 Vancouverensis Lea. Wh. 5, yellowish-green, shining, very slight revolving grooves; diam. 1.10 to *1.25, axis 0.40.
6 sportella Gould. Wh. 5, pale-greenish, growth lines coarse, crossed by revolving grooves; diam. *0.50 to 0.70, axis 0.20 to 0.25.
7 Voyana Newc. Wh. 5, pale corneous, mouth much sinuated above, body whorl crossed by a thick callus; diam. *0.50, axis 0.15 to 0.20.
Subfam. Gastrodontinæ. Generally depressed conic, and lamellarly toothed inside, growth lines distinct, small.
V Group. Conulus Fitz. minute, conoid, whorls 4 to 6, narrow, aperture basal, transverse, perforate or not, without teeth.
8 chersina Say. Wh. 5-6, amber-yellow, imperforate, base indurated, smooth, shining; diam. 0.10 to 0.12, axis, 0.08.
9 chersinella Dall. Wh. 4½ to 5, yellowish, narrowly perforate, mouth oblique, growth ribs distinct; diam. *0.14, axis 0.09.
Subfam. Patulinæ. Thickish, epidermis opaque, form discoidal to subglobose, umbilicate, often striped or hirsute.
VI Group. Pseudohyalina Morse. Minute, convex discoid, nearly smooth, umbilicate, unicolor, whorls 3 to 5.
10 milium Morse. Wh. 3, greenish white, plano-convex, translucent, minute revolving grooves; diam. 0.05, axis 0.02. Nevada Co. and Angel Island, Rowell, Monterey, Canfield, San Francisco and Santa Cruz, rare. No revolving grooves seen.