64 



815 Galerus fastigiatus Gould. 

 Vancouver Island to Lobitos, California. 

 Synonym of Galerus mammillaris? 



816 Galerus mammilaris Broderip. 

 See No. 2638. 



817 Gibbula rubescens Carpenter. 

 San Pedro, California. 



818 Glyptostoma newberryanum Binney. 



San Pedro, Cal., to Ensenada, Lower California. 



819 Goniobasis acutifllosa Stearns. 

 Eagle lake, California. 



820 Goniobasis bairdiana Lea. 

 Astoria, Oregon. 



821 Goniobasis bulbosa Gould. 

 Columbia river, Washington. 



822 Goniobasis circumlineata Tryon. 



San Antonio creek, Marin county, to Pit river, California. 



823 Goniobasis draytoni Lea. 

 Oregon to Napa county, California. 



824 Goniobasis newberryi, Lea. 

 Des Chutes river, Oregon. 



825 Goniobasis nigrini Lea. 

 Shasta to Napa county, California. 

 Dall, Nautilus 4:87, 88. 



826 Goniobasis occata Hinds. 



Shasta to Contra Costa county, California. 



827 Goniobasis plicifera Lea. 



Columbia river and branches, Oregon, to Montana. 



Dall, Nautilus 4:87-88. 

 828 — Variety bulimoides Tryon. 



Hemphill, Nautilus 4:27. 

 829 Goniobasis rubiginosa Lea. 



Oregon. 

 880 Goniobasis rudens Reeve. 



Willamette river, Oregon, to Shasta and Plumas counties, Cal. 



831 Goniobasis silicula Gould. 



Rivers, Puget Sound to Shasta river, California. 



832 Gundlachia calif ornica Rowell. 



Aperture suboval, obliquely expanded towards the left, poste- 

 riorly rounded, and wider anteriorly. Internal shelf reaching 

 forward about one-fifth the length of the shell, its margin slightly 

 concave and oblique. Dorsal surface convex, becoming somewhat 

 keel-shaped towards the apex, which is strongly and obliquely 

 deflected so as to make the right border nearly a straight line, 

 while the expansion on the left projects nearly as far back as the 

 apex at an obtuse angle. Structure corneous, with strong con- 

 centric lines of growth and faint radiating striae. Color dark 

 brown, opaque; inner surface shining and purplish, the plate 

 white towards the edge, and in some specimens showing a thick- 

 ened, white semicircle continuous with its margin across the arch 

 of the shell. Length 4, width 2, altitude 1.5 mm. 



Living: On stems of plants growing in stagnant ponds, Cali- 

 fornia, often two or more on the back of another. Feather river 

 to Merced river, west to coast. 



