214 PALAEONTOLOGY OF CALIFORNIA. 



HELICANCYLUS, Gabb. H. ^quicostatus, Gabb. 



Ptychoceras ccquico status, Gabb; Vol. 1, p. 74, pi. 13, fig. 20. 

 H. cequicostatus, Gabb ; Vol. 2, p. 141, pi. 25, fig. 20, a-g. 

 Shasta Group, Cottonwood Creek, Alderson's Gulch, and Eagle Creek, Shasta 

 County. 



DIPTYCIIOCERAS, Gabb. D. laevis, Gabb. 



D. Icevis, Gabb; Vol. 2, p. 144, pi. 25, fig. 21, a, b. 

 Shasta Group, Cottonwood Creek. 



BACTJLITES, Lam. B. Chicoensis, Trask. 



B. Chicoensis, Trask ; Proc. Cal. Acad., 1856, p. 85, pi. 2, fig. 2. 

 B. Chicoensis, Gabb; Vol. 1, p. 80, pi. 17, fig. 27, 27 a; pi. 14, fig. 27 b, 29, 29 a. 

 Chico Group, Chico, Pence's, Cottonwood, Orcstimba, and San Diego; Mar- 

 tinez Group, Martinez. 



B. occidentalis, Meek. 



B. ovatus, ? Meek; Tr. Alb. Inst., Vol. 4, p. 48. 



B. occidentalis, Meek; loc. cit., p. 49. 



Id., Meek; Proc. Phil. Acad., 1801, p. 316. 



B. sp. indet., Gabb ; Vol. 1, p. 81, pi. 14, fig. 28 b ; pi. 17, fig. 28, 28 a. 



Chico Group, Vancouver Island. 



B. inornatus, Meek. 



B. inornatus, Meek; Proc. Phil. Acad., 1861, p. 316. 

 Sucia Island, Gulf of Georgia. 



GASTEROPODA. 



TYPHIS, Montf. T. antiquus, Gabb. 



T. antiquus, Gabb ; Vol. 1, p. 82, pi. 18, fig. 31. 

 Tejon Group, Maritnez, Tejon. 



FUSUS, Lam. F. Martinez, Gabb. 



F. Martinez, Gabb; Vol. 1, p. 82, pi. 18, fig. 32. 

 Tejon Group, Martinez, Tejon. 



