Shell smoky horn color, nearly flat above, smooth, with a perspective umbilicus; suture well impressed; aperture lunate; lip simple; whorls four.
In the umbilicus resembling H. striatella Anthony, with a smooth surface and a dull, smoky hue. Only three specimens were found, under damp logs and bark along a mountain stream, together with H. Breweri, and chersina.
H. Breweri Newc. State Collection, Species 1113.
H. testa discoidea, pallide-cornea, nitida, lucida; sutura sub-canaliculata, late umbilicata; anfr. 5. apertura lunaris; labro tenue simplici.
Diam. 0.20 pol. Alt 0.10 pol.
Hab. prope “Lake Taho,” Cal., et montibus septentrionalibus.
Shell discoidal, pale corneous, shining, transparent, suture slightly channelled, broadly umbilicate; whorls 5; aperture lunate; lip thin, simple.
This shell may be compared with H. arborea Say, from which it differs by its less elevation, more polished and lighter colored surface, and more open umbilicus. Eight specimens found; one from Northern California, by Prof. Brewer.
Helix Duranti Newc. State Collection, Species 987.
H. testa depressa, discoidea, pallide-cornea sub-lente minutissime striata, opaca, late et perspective umbilicata; anfr. 4. ultimus declivis non descendens; sutura linearis; apertura rotundata-lunaris; peristomate simplici, approximato.