11 minuscula Binn. Wh. 4, whitish, nearly flat, mouth sub-oval, whorls narrow, smooth, a parietal callus; diam. 0.09, axis 0.01.
12 conspecta Bland. Wh. 4, dark corneous, obtuse convex, smooth, mouth sub-circular, oblique; diam. 0.08 to 0.10, axis 0.04 to 0.05.
VII Group. Patula Held. Size moderate, convex-discoid, concave below, umbilicus showing all the whorls, unicolor.
13 Hornii Gabb. Wh. 4½, opaque, brown, sparsely hirsute, spire flattened, umbilicus a little contracted; diam. *0.16, axis 0.09.
14 Whitneyi Newc. Wh. 4, smoky-brown, smooth, nearly flat, umbilicus plainly perspective; diam. *0.20, axis 0.10.
15 Cronkhitei Newc. Wh. 4, yellowish corneous, a little convex, growth-ribs distinct, not plainly perspective; diam. *0.20, axis 0.15.
16 striatella Anth. Wh. 3-4, pale corneous, depressed convex, umbilicus large, shallow, growth-ribs faint; diam. 0.20, axis 0.15. The west slope specimens may be all of last species.
17 Durantii Newc. Wh. 4, light corneous, flat above, nearly smooth, umbilicus perspective, opaque; diam. *0.20, axis 0.07.
VIII Group. Helicodiscus? Morse. Planorboid, whorls visible below, several sets of internal teeth. (“Polygyra” Tryon, part.)
18 polygyrella Bland. Wh. 7 to 8, yellowish horn color, 3 teeth opposite mouth, 3 nearer mouth, 1 parietal; diam. *0.44, axis 0.19.