226 PALAEONTOLOGY OF CALIFORNIA. 



ANCHURA, Con. A. faloiformis, Gabb. 



Aporrhais falciformis, Gabb ; Vol. 1, p. 127, pi. 20, fig. 83. 

 Anchurafalciformis, Gabb; Amer. Jour. Conch., 1868, p. 145 

 A. falciformis, Gabb; Vol. 2, p. 165. 

 Chico Group, Tuscan Springs, Chico, Fence's, Texas Flat. 



A. ANGULATA, Gabb. 



Aporrhais angulaia, Gabb; Vol. 1, p. 128, pi. 20, fig. 84. 

 Martinez, and (?) Huling Creek, Shasta County. 



A. Californica, Gabb. 



Aporrhais Californica, Gabb ; Vol. 1, p. 128, pi. 29, fig. 230, a, b. 



Chico Group, Orestimba, Martinez, Puerto Canon, and Siskiyou Mountains. 



A. exilis, Gabb. 



Aporrhais exilis, Gabb; Vol. 1, p. 129, pi. 29, fig. 231. 

 Martinez (?) Group, Martinez. 



A. transversa, Gabb. 



A. transversa, Gabb; Vol. 2, p. 165, pi. 27, fig. 45. 

 Martinez Group, Martinez. 



? A. carinifera, Gabb. 



? A. carinifera, Gabb ; Vol. 2, p. 166, pi. 28, fig. 46. 

 Martinez Group, Martinez. 



HELICAULAX, Gabb. H. bicarinata, Gabb. 



H. bicarinata, Gabb ; Vol. 2, p. 166, pi. 27, fig. 47. 

 Shasta Group, Cottonwood Creek. 



H. costata, Gabb. 



H. costata, Gabb ; Vol. 2, p. 167, pi. 28, fig. 48. 

 Martinez Group, Martinez. 



TESSAROLAX, Gabb. T. distorta, Gabb. 



T. distorta, Gabb; Vol. 1, p. 126, pi. 20, fig. 82, a, b. 

 Chico Group, Tuscan Springs. 



