36 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



If the faunal dissimilarity that is apparent in the Lower 

 and Upper Chico is to be taken as evidence of a disconti- 

 nuity in the deposition of this member, it ought also to 

 appear in deposits outside of the basin of the Sacramento, if 

 the disturbance extended so far. And when the lists of 

 Chico species from the different localities are examined 

 with a view to discovering such evidence, it can only be 

 said that the fragmentary collections that have been made 

 at distant points thoughout the Coast Ranges toward the 

 south are, as a rule, either prevailingly Upper or prevail- 

 ingly Lower Chico for any given locality. The various 

 papers by H. W. Fairbanks furnish a number of such lists 

 that will be found interesting. 



Upon the Eagle Ranch in northern San Luis Obispo 

 County, the Chico beds that immediately overlie the 

 Aticella-\i^-Ar\x\^ shales have furnished the following spe- 

 cies: Baculites chico'cnsis, Trigonia evansana {'^),Pectun- 

 culus veatcht, CticullcBa sp., and Pentacrimts. None of 

 these species belong exclusively to the Lower Chico, while 

 some of them have never been found there. Baculites chi- 

 co'cnsis is, perhaps, peculiar to the Upper division alone. 

 The Pecluncidus and Pentacrinus are probably undescribed 

 species. Farther southward, in Santa Barbara County, 

 a collection from the Sisquoc Canyon consists of the 

 following: — 



Inoceramus sp. Pectunculus veatchi 



Baculites chicoensis Meekia sella 



Dentaliuin stramineum Cinulia obliqua 



Cylichna costata Tellina ashburneri 



The same evidence appears in this list as in the preced- 

 ing, except that more of the species are those of the Upper 

 Chico alone. Such evidence is, of course, only corroborative, 

 and does not of itself establish the fact of different epochs 

 for the Lower and Upper Chico. It shows, however, that 

 the subsidence that attended or introduced the later portion 

 of the Chico was not entirely local. Other occurrences of 

 the Chico are represented in the following lists. 



