CRETACEOUS FOSSILS. 251 



P. OPERCULIPORMIS, Gabb. 



Pecten operculiformis, Gabb; Vol. 1, p. 201, pi. 26, fig. 188. 



Chico Group, Cottonwood and Huling Creeks, and south of Mount Diablo. 



P. CALIFORNICUS, Gabb. 



Pecten Californicus, Gabb; Vol. 1, p. 201, pi. 31, fig. 270. 

 Chico or Shasta Group, Cottonwood Creek, Shasta County. 



P. MARTINEZENSIS, Gabb. 



Pecten Martinezensis, Gabb ; Vol. 2, p. 198, pi. 33, fig. 96. 

 Martinez Group, Martinez. 



P. COMPLEXICOSTA, Gabb. 



Pecten complexicosta, Gabb ; Vol. 2, p. 199, pi. 33, fig. 97 a, 

 Shasta Group, Morgan Valley, Lake County. 



P. INTERRADIATUS, Gabb. 



Pecten inter radiatus, Gabb ; Vol. 2, p. 199, pi. 33, fig. 98 . 

 Tejon Group, New Idria. 



NEITHEA, Drouet. N. GRANDIOOSTA, Gabb. 



Neithea grandir.osta, Gabb ; Vol. 2, p. 200, pi. 33, fig. 99 a. 

 Shasta Group, Cottonwood Creek. 



LIMA, Brug. L. MICROTIS, Gabb. 



Lima microtis, Gabb; Vol. 1, p. 202, pi. 26, fig. 189. 

 Chico Group, Cottonwood Creek (and Texas Flat ?). 



L. APPRESSA, Gabb. 



Lima appressa, Gabb; Vol. 1, p. 203, pi. 31, fig. 271. 

 Chico Group, Pacheco's Pass. 



L. SHASTAENSIS, Gabb. 



Lima Shastaensis, Gabb ; Vol. 2, p. 201, pi. 33, fig. 100. 

 Shasta Group, Cottonwood Creek. 



