238 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Range. Crescent City, California, to Magdalena Bay, Lower Cali¬ 
fornia. Fossil: Pleistocene, San Pedro, San Joaquin Bay, Orange County, 
California. 
Described as Fissurella (Glyphis) murina. Carpenter. 
Genus HEMITOMA Swainson, 1840 (Subemarginula) 
Shell depressed, anterior margin slightly channeled. (Woodward, 
Manual of the Mollusca .) 
Type. Emarginula octoradiata. 
Distribution. West Indies, Great Britain, Norway, Philippines, Aus¬ 
tralia, California. 
Described as subgenus of Emarginula. 
Hemitoma bella Gabb, 1865 
Proceedings of the California- Academy of Sciences, 3:188. 
E. t. alba, oblonga-ovalis, subelevata, antice parum convexa, postice 
excavata, parte anteriori angustiori; apice excentrico, prominente, parum 
recurvato; sinu mediocri; costis radiantibus circiter xix cum costis minori- 
bus interstitialibus irregularitur alternantibus, per lineas concentricas 
clathratis. Long., .55; lat., .36; alt., .22. 
Shell oblong oval, somewhat elevated, narrowest anteriorly; apex ex- 
centric, posterior, prominent and somewhat recurved; outline in front of 
the apex slightly convex, from the apex to the posterior margin slightly 
excavated, sides descending nearly straight; sinus moderate, variable, situ¬ 
ated at the extremity of strong rib; surface ornamented by about nineteen 
large radiating ribs, with smaller ones interposed, all crossed by moderately 
prominent concentric ridges; color white. (Gabb.) 
Type in California State Survey, Mollusca, No. 466. Type locality, 
Monterey, California. 
Range. Santa Cruz to San Pedro, California. 
Described as Emarginula bella Gabb. 
Hemitoma golischae Dali, 1916 
Plate 85, fig. 2 
Nautilus , 30:61. Bulletin 112, United States National Museum, PI. 5, fig. 2. 
Shell of moderate size, radiately ribbed, concentrically zoned and radi- 
ately striped with dark rose color, the worn apex greenish, the interior 
whitish, the extreme edge of the slightly crenulated interior margin with 
the external coloration showing through. Sculpture of rather strong radial 
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