450 DILLER AND STANTON — THE SHASTA-CHICO SERIES. 



These notes will serve to show that the Knoxville fauna is closel}^ 

 connected in its later portions with the succeeding Horsetowni fauna, and 

 that we have no evidence of any faunal break within it, though there is 

 a progressive change in the forms from the lower portions to the top. 

 Of the Cephalopoda at least four s})ecies (Lytoceras balesi, Olcostephanus 

 sp., Crloceras latus, and Belemnites im/pressus) pass up into the overlying 

 Horsetown beds, and two other Horsetown species (^Desmoceras hreweri 

 and Phylloceras (?) ramosus) are represented in the Knoxville by frag- 

 mentary specimens that belong to the same or closely allied species. 

 The other Knoxville ammonites, consisting chiefly of Hoplites, seem to 

 be most closely related to Neocomian species, though several of them 

 are comparable with European Upper Jurassic (Tithonian) forms. A 

 few of the species belonging to other classes seem to have Jurassic affini- 

 ties, so it is probable that the oldest Cretaceous is represented in the 

 Knoxville. The undoubted Cretaceous age of the upper part of this 

 division and its evident unbroken continuity make it most natural and 

 reasonable to assign the whole of it to the Cretaceous system. Compared 

 with the fauna of the Mariposa beds, w^hich is of late Jurassic Jige ac- 

 cording to the recent investigations of Professors Hyatt and Smith, it 

 seems to be totally distinct, excepting that the genus Aucella is present 

 in both. 



A paper in preparation will contain descriptions and illustrations of 

 all the known species from the Knoxville beds, and more definite com- 

 parisons and correlation will there be attempted. 



Flora of the Series. 



During the last field season a number of fossil plants were collected in 

 Tehama and Shasta counties of California, chiefly from the Horsetown 

 beds. They were referred for study to Professor W. M. Fontaine, who 

 has identified the species given in the following list : 



Locality. Locality. 



^Sagenopteris mantelli. a. lyCladophlebis indinata (?) d. 



Pterophyllum calif ornicum, n. sp. a. ' Osmunda dicksonioides (?) d. 



' Angiopteridium canmorense (?) h, d, e. ■Anglopteridium strictinerve (?) d. 



Cephcdotoxopsis magnifolla (?) b. " nervosum (?) d. 



I Glossozamiteff klipsteini. b, d. Aspidium dunkerl (?) ' d. 



Abietites {?) c. : '' heferophyllum. d. 



, Dioonites buchianus, \£ir. rarinervis (?) c. , Aspleniopteris pinnatifida (?) d. 



yEquisetum texense (?) c. / Thinnfeldia variabilis (?) d. 



Fecopteris strictinervis (?) d. [ Bioonites buchianus,\Sir. angustifoliiis. f, g. 



Tkyrsopteris rorinervis (?) d. ■ Ahietites angusticarpus. h. 



Nageiopsis longifolia (?) d. \ Sagenopterls latifolia. i. 



Sagenopteris, sp. (?) d. Abietites caUfornicvs, n. sp. j. 



O'phnlofa.ropsis, sp. (?) d. Dlornilfes dunlrria)iiis. j. 



