FOSSIL FLORA OF THE SERIES. 451 



The localities from whicli the plants were collected are as follows : 



fi. Tehama county, Bald hills, east of Wilcox's ranch, top of the Knoxville beds. 

 h. '' " Bald hills, near Wilcox's ranch, base of the Horsetown beds. 



r. " " near the school-house southwest of Lowreys, upper portion of 



Knoxville beds. 

 (L " " north fork of Elder creek, above AVoody's ranch, upper jDor- 



tion of Knoxville beds. 

 e. " " Cold fork, near Stephenson's, upper portion of Knoxville beds. 



/. Shasta " Byron gulch, west of Ono, near base of Horsetown beds, 



r/. " " Byron gulch, near Ono, lower portion of Horsetown beds. 



h. '• " north fork of Cottonwood creek, below mouth of Eagle creek, 



middle portion of Horsetown beds. 

 I. " " Eagle creek, near Ono, lower portion of Horsetown beds. 



j. '•' "■ one and a half miles northeast of Horsetown, upper part of 



Horsetown beds. 



Professor Fontaine remarks that — 



*' Whatever may be thought of the value of the preceding identifications, it is at 

 least clear that we have in these twenty-six plants different forms. All have their 

 nearest relations in Lower Cretaceous forms, and there is no plant that would indi- 

 cate an age different from Lower Cretaceous. This alone is strong evidence of the 

 age of the strata, and it is perhaps a better indication than would be identical 

 species, if few in number and not of well marked character. 



" But there are some of the jilants that are well enougli preserved and of sutfi- 

 ciently decided character to permit us to gain some positive proof of age. These 

 are Sagenopteris manklli, Abietites angHsticarpns, Dioonitea bucJdaniis, var. angustifoUns ; 

 Diooiiites dunkerianm, Aspidiam hderoplii/llum — five out of twenty-six. Then, Ptero- 

 pliyllam californicnm and Ahietlfe.s calif or nicns, are so much like Lower Cretaceous 

 species that they are in fact representative of them. There can be no hesitation in 

 regarding the plants collected from the Shasta group as being of Lower Creta- 

 ceous age." 



The plants to which the above statements refer were collected from 

 various horizons ranging through nearly 8,000 feet of strata from within 

 the upper portion of the Knoxville to nearly the top of the Horsetown 

 beds and include none which are dicotyledonous. The only dicoty- 

 ledonous plant in our collections came from the lower portion of the 

 Chico l)eds on Elder creek, where a single specimen was obtained. 



Unity of the Series. 



The three sections of the Shasta-Chico series already given show con- 

 clusively that there is complete continuity from the bottom of the Knox- 

 ville to the top of the Chico. The strata, where all are well exposed in 



LXriI— Bull. GEOf,. Soc Am., Vol. /i, 1893. 



