CRETACEOUS FOSSILS. 227 



LOXOTREMA, Gabb. L. turrita, Gabb. 



Loxotrema turrita, Gabb; Amer. Jour. Conchology, 1868, p. 147. 

 L turrita, G-abb ; Vol. 2, p. 1G8, pi. 28, fig. 49. 

 Tejon Group, near Griswold's. 



POTAMIDES, Brogn. P. diadema, Gabb. 



Potamides diadema, Gabb ; Vol. 1, p. 130, pi. 20, fig. 85. 

 Shasta Group, Cottonwood Creek. 



P. tenuis, Gabb. 



Potamides tenuis, Gabb; Vol. 1, p. 130, pi. 20, fig. 86. 

 Chico Group, Pence's. 



LITTORINA, Ferr. L. compacta, Gabb. 



? Littorina compacta, Gabb ; Vol. 1, p. 131, pi. 20, fig. 89. 

 Chico Group, Texas Flat, Placer County. 



ATRESITJS, Gabb. A. liratus, Gabb. 



A. liratus, Gabb ; Vol. 2, p. 169, pi. 28, fig. 50. 

 Shasta Group, Colusa County. 



TTJRRITELLA, Lam. T. infralineata, Gabb. 



T. infralineata, Gabb; Vol. 1, p. 131, pi. 20, fig. 87. 

 Chico Group, Cottonwood Creek, and Orestimba. 



T. INFRAGRANULATA, Gabb. 



T. infragranulata, Gabb ; Vol. 1, p. 212, pi. 32, fig. 279. 

 Martinez (?) Group, Martinez. 



T. SERIATIM-GRANULATA, Eoem. 



T. seriatim-granulata, Eoem ; Kreid. Tex., p. 39, pi. 4, fig. 12. 



T. planilateralis, Con. ; Emory's Rep., Mex. Boundary, p. 158, pi. 14, fig 1. 



T. irrorata, Con. ; Proc. Phil. Acad., 1855, p. 268. 



Chico Group, Tuscan Springs, Cottonwood Creek, Shasta County, and Cot- 

 tonwood Creek, Siskiyou County. Also found in Texas, and at Arivechi, 

 Sonora. 



