20 PROCEEDINGS OF THE ACADEMY OF 



containing five molars, and showing in a remarkable degree the 

 nlethod of growth and reiDlacement of the teeth ; deposited in 

 Yale College. 



No. 2. Molar in bowlder of conglomerate, found in Alameda 

 Creek, and presented to writer; deposited in Yale College. 



Amador County. Near Volcano, in auriferous gravel. Locality 

 visited. 



Calaveras County. At Douglas Flat, near Murphy's. Locality 

 visited. 



Contra Costa County. No. 1. At Oak Springs, lower jaw entire 

 and upper molars of Mastodon obscurus, taken out of the base of 

 a pliocene hill by the writer ; entire skeleton in the rock, but im- 

 possible to take it out; lower jaw and upper molar in Amherst 

 College ; upper molar and fragment of tusk in Yale College. 



No. 2. Molar taken out of tunnel on the railroad between 

 Somersville and Pittsburg Landing. Locality visited. 



Ul Dorado County. No. 1. At Grey's Flat, molars in recent 

 gravel deposit. Locality visited. 



No. 2. El Dorado Ranch, several molars and fragment. Lo- 

 cality visited. The " Doctor" who had them pronounced them 

 " Saurian teeth." The teeth had been broken up, and he called 

 each fragment (consisting of a cusp) an entire tootli, but on seeing 

 the pieces put together, and forming a large molar, he thought 

 " perhaps it might be so," but seemed loth to believe it, and re- 

 fused to part with even a fragment. 



No. 3. At Gold Hill, near Placerville. 



Jlendocino County. Locality unknown. 



Placer County On North Fork of American River, above 



Rattlesnake, in gravel. Locality visited. 



Santa Barbara County. At Gaviota Pass. (Prof. J. D. Whit- 

 ney.) 



Stanislaus County. On Dry Creek, Mastodon Shepardi; new 

 species discovered b}' the writer in pliocene sandstone, at the base 

 of a high perpendicular bluff; fragments of tusks in Amherst and 

 Yale Colleges. 



Solano County. Near Benicia. Locality visited. 



Sonoma County. Near Petaluma. Bones in recent deposit 

 near creek. Locality visited. 



Tuolumne County. No. L At Texas Flat, in aurifei'ous gravel. 

 Locality visited. 



No. 2. At Shaw's Flat, in auriferous gravel. Locality visited. 



No. 3. At Gold Springs, in auriferous gravel. Locality visited. 



No. 4. Under Table Mountain ? (Dr. Snell) in old river bed. 

 Locality visited. 



It will be seen that the majority of the localities given have 

 been visited by the writer. Particular attention has been given 

 to the formations and accompanying fossils, and search made for 

 evidences of the handiwork of man, but up to this time the writer 

 has failed to discover anything which would show conclusively 



