Publications of the United States Government. 55 



Pacific Railroad Reports, vol. 6, no. 2. (Continued.) 



The author discusses the age of the formation afterward called by 

 the California geologists the Chico group. Newberry admits the 

 Tertiary character of a part of the fossils, but is inclined to refer 

 the formation to the Cretaceous, because of the presence in it of 

 Ammonites, etc. 



Pacific Railroad Reports, vol. 7. Routes in California to con- 

 nect with the routes near the 35th and 32d parallel and 

 routes near the 32d parallel, between the Rio Grande and 

 Pimas villages, explored by John G. Parke in 1854-55. 

 Geological report by Thomas Antisell. (33d Cong., 2d 

 sess., Senate Ex. Doc. 78. 1857.) 



This report contains chapters on the physical geography of the 

 Pacific Coast ; geology of the Coast Ranges ; Santa Clara Valley 

 and Pajaro River Valley ; Salinas River Valley ; Santa Margarita 

 Valley ; Point Pinos Mountains and Sierra San Jose ; Santa Maria 

 River and Cuyama Valley ; Santa Lucia Mountains ; Valley of 

 San Luis Obispo, Santa Barbara Mountains ; geology of the Sierra 

 Susanna and Monica ; Plains of San Fernando ; Los Angeles and 

 San Bernardino ; with the geology of the Cordilleras, etc. ; Estrella 

 River ; Panza and Carrizo ; Mojave River Valley ; bituminous 

 effusions ; Quaternary period in California ; geology of the district 

 from San Diego to Fort Yuma, and from Fort Yuma to the Pimas 

 villages ; etc., etc. 



Pacific Railroad Reports, vol. 7. Report on the Palaeontology 

 of the survey; by T. A. Conrad. Chapter XXIX, pp. 

 189-196, with 10 pi. 



The author remarks that the Miocene of Santa Barbara contains 

 a group of shells more analogous to the fossils of the Atlantic slope 

 than to the existing shells of California ; but it is evident that there 

 must be subdivisions in the Tertiary deposits of California, which 

 range between the Eocene and Pliocene periods, for the group of the 

 Estrella Valley and Santa Ynez (Barbara) Mountains does not 

 appear to contain one species, even, analogous to any in the Santa 

 Barbara beds, and, on the contrary, some of them remind us of the 

 existing Pacific fauna. 



The author describes and figures the following new species : 



From Santa Margarita, Salinas Valley : Hinnetes crassa. 



From San Rafael Hills and Santa Barbara County : Pecten 

 Meeki; P. altiplicatus; Arcopagia unda. 



From Carrizo Creek, Colorado Desert, and Estrella River Valley : 

 Pecten deserti, Conrad ; Pallium Estrellanum, Spondylus Estrel- 

 lanus; Arcopagia unda; Cyclas Estrellana; Ostrea panzana; 

 Glycimeris Estrellanus; Balanus Estrellanus; Astrodapsis Antiselli. 



From Santa Ynez and Santa Ynez Mountains : Pecten discus; 

 Pachydesma Inezana; Pecten magnolia; Crassatella collina; MytUus 

 Inezensis; Turrit ella Inezana; T. variata; Ndtica Inezana; Tapes 

 Inezensis. 



