40 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Cardium vaquerosensc Arnold. 

 Chione tenihlorensis Anderson. 

 Phacoides richthofeni Gabb. 

 Pecten andersoni Arnold. 

 Venus pertemtis Gabb. 

 Conus hayesi Arnold. 

 Conns ozvenianus Anderson. 

 Nassa arnoldi Anderson. 

 Neverita inesana Conrad. 

 Oliva calif ornica Anderson. 

 Plenrotoma dumhlei Anderson. 

 Trochita, sp. 



Trophon gabbianum Anderson. 

 Turritella ocoyana Conrad. 



Faunal Relations of Temblor. — A large number of well pre- 

 served marine invertebrates was obtained from nearly all 

 horizons in the Temblor of the San Juan area. The greater 

 portion of them, however, came from strata near the middle 

 of the section where the character of the sediments is most 

 favorable for the preservation of organic remains. In com- 

 paring this fauna with that obtained from the lower Miocene 

 of other localities, such as the Kern River district, Kern 

 County, and Los Vaqueros Valley, Monterey County, it will 

 be seen that nearly all the Temblor species found in the San 

 Juan district occur in the Temblor group of Kern River, 

 while some of the species most characteristic of the lowest 

 horizon, in Los Vaqueros Valley have not been found in the 

 San Juan district. There is some evidence, however, that the 

 Temblor of the San Juan district is not far removed, strati- 

 graphically, from the lower horizon of the Los Vaqueros 

 Valley, which has been referred to as the Turritella inezana 

 Zone. In the Los Vaqueros Valley, Scutella norrisi Pack 

 occurs with Pecten sespeensis Arnold, Thais vaquerosensis 

 (Arnold), Turritella inezana Conrad, and a number of other 

 species which are common in both horizons of the lower Mio- 

 cene of Kern River and the San Juan district. In the San 

 Juan district, Scutella norrisi Pack and Astrodapsis merriami 

 Anderson occur together in a coarse sandstone near the middle 

 of the series in Sec. 30, T. 28 S., R. 15 E., East of the San 

 Juan River along the north edge of Sec. 3, T. 30 S., R. 17 E., 



