366 SUPPLEMENT TO DESCRIPTIONS OF SPECIES. 
ConTra-Costa Co.—San Antonio, chalcedony. 
DEL Norte Co.—Crescent City, agate, carnelian ; Low Divide, chal- 
copyrite, boruite, malachite ; on the coast, iridosmine, platinum, gold, 
zircon, diamond, 
Eu Dorado Co.—Pilot Hill, chalcopyrite; near Georgetown, hessite, 
from placer diggings ; Roger’ s Claim, Hope Valley, grossular garnet, 
in copper ore ; Coloma, chr omite ; Spanish Dry Diggings, gold ; Gran. 
ite Creek, roscoelite, gold ; Forest Hill, diamond ; Cosumnes mine, 
molybdenite. 
FRESNO Co.—Chowchillas, andalusite ; King’s River, bornite. 
HuMBOLDT Co.—Cryptomorphite. 
Inyo Co.—Inyo district, galenitz, cerussite, anglesite, barite, ataca- 
mite, calcite, grossular garnet! Surprise Mine, tetrahedrite ; Kear- 
sarge mine, silver ores ; Cerro Gordo, wulfenite. 
Kern Co.—Green Monster mine, cuproscheelite. 
LAKE Co.—Borax Lake, borax! sassolite, glauberite ; Pioneer mine, 
cinnabar, native mercury, selenide of mercury ; near the Geysers, 
sulphur, hyalite ; Redington mine, metacinnabarite ; Lower Lake, 
‘chromite. . 
Los ANGELES Co.—Near Santa Anna River, anhydrite ; Williams 
Pass, chalcedony ; Soledad mines, chalcopyrite, garnet, gypsum ; 
Mountain Meadows, garnet, in copper ore. 
Mariposa Co.—Chalcopyrite, itacolumyte ; Centreville, cinnabar ; 
Pine Tree mine, tetrahedrite ; Burns Creek, limonite ; Geyer Gulch, 
pyrophyllite ; La Victoria mine, azurite / near Coulterville, cinnabar, 
gold. ze 
Mono Co.—Partzite (stibiconite). 
MontTeEREY Co.—-Alisal mine, arsenic ; near Paneches, chalcedony ; 
New Idria mine, cinnabar ; near New Idria, chromite, zaratite, chrome 
garnet ; near Pacheco’s Pass, stibnite. 
Napa Co.—Chromite. 
NeEvaDAa Co.—Grass Valley, gold/ in quartz veins, with pyrite, 
chalcopyrite, blende, arsenopyrite, galenite, quartz, biotite ; near 
Truckee Pass, gypsum ; Excelsior Mine, molybdenite, with gold; 
Sweet Land, pyrolusite. 
PLACER Co —Mincr’s Ravine, epidote / with quartz, gold. 
PLumMAs Co.—Genesee Valley, chalcopyrite ; Hope mines, bornite, 
sulphur. . 
SANTA BARBARA Co.—Saa Amedio Canon, stibnite, asphaltum, bitu- 
men, maltha, petroleum, cinnabar, iodide of mercury ; Santa Clara 
River, sulphur. 
SAN BERNARDINO Co.—Colorado River, agate, trona ; Temescal 
Mts., cassiterite; Russ District, galenite, cerussite ; Francis mine, 
cerargyrite ; Slate Range, thenardite, borax, common salt; San Ber- 
nardino Mts., graphites. 
Santa CLARA Co.—New Almaden, cinnahar, calcite, aragonite ser- 
pentine, chrysolite, quartz, aragotite ; North Almaden, chromite ; Mt. 
Diabolo Range, magnesite, datolite, with vesuvianite and garnet. 
San Dreso Co.-—Carisso Cre ek, gypsum ; San Isabel, tourmaline, 
orthoclase, garnet. 
San Francisco Co.—Red Island, pyrolusite and manganese ores. 
San Luis Oxsispo Co.—Asphaltum, cinnabar, native mezcury, 
chromite. 
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