136 



GEOLOGY. 



Columbia, attended by a fauna quite different from that of the warmer 

 coast farther south, not so affected. This is not an appeal to great 

 climatic differentiation, which is not sustained by the flora, but to 



Fig. 387. — Fauna of the Shastan series, chiefly Knoxville. Cephalopoda: a, Lyto- 

 ceras batesii Trask; b, Phylloceras knoxvillensis Stanton; c, Hoplites angulatus 

 Stanton. Gastropoda: d, Astresius liratus Gabb; e, Amberleya dilleri Stanton; 

 /, Cerithium paskentaensis Stanton; g, Hypsipleura gregaria Stanton; h, Turbo 

 moyonensis Stanton. Pelecypoda: i, Pecten complexicosta Gabb; j, Corbula (?) 

 persulcata Stanton; k and I, Aucella piochii var. orata Gabb ; m,A crassicollis Key- 

 serling; n, Astarte calif ornica Stanton; o, Area tehamaensis Stanton; p, Nucula 

 storrsi Stanton; q, Leda glabra Stanton. Brachiopoda: r,Rhynchonellawhitney', 

 Gabb. (After Stanton.) 



such a moderate difference as has probably always existed between 

 the high and low latitudes. The flora of the high latitudes is not 

 tropical but warm temperate. 



