194 University of California Publications in Geology [Vol. 10 



The literature dealing with the Pliocene of Middle and Northern 

 California, but not including the Etchegoin of the Coalinga District, 

 has recently been summarized by Bruce Martin. 3 Since the paper by 

 Martin was written, several other publications have appeared de- 

 scribing the California Pliocene which will here be mentioned briefly 

 according to date of publication. 



A short paper on the Fernando group, published by W. A. Eng- 

 lish 4 in 1914, deals essentially with the Pliocene at Elsmere Creek 

 about thirty miles northwest of Los Angeles, California, and presents 

 faunal lists which have been found very valuable for correlation pur- 

 poses in the present paper. 



In the course of their investigation of the geology and economic 

 resources of Middle California a short bulletin has been issued by 

 R. W. Pack and W. A. English/' In this paper almost no palaeonto- 

 logic discussion is entered into and the various horizons of upper 

 Miocene and lower Pliocene are considered as one group, which is 

 referred to the upper Miocene. 



The Etchegoin is briefly referred to by P. M. Anderson and Bruce 

 Martin 1- ' in a publication on the San Juan district, San Luis Obispo 

 County, California, and a few species described from the Pliocene near 

 Coalinga. 



Professor J. C. Merriam 7 has recently described the occurrence of 

 vertebrates in zones having a definite relationship to invertebrate zones 

 north of Coalinga. The forms described from the Etchegoin occur 

 in the area covered by the study of the writer in the present paper. 

 Professor Merriam brings forth evidence indicating the Pliocene age 

 of the Jacalitos and Etchegoin. In later papers Professor Merriam 8 

 describes a species of Pliohippus from the upper Etchegoin. 



In a recent paper on the geology of the region bordering the west- 



3 Martin, Bruce, The Pliocene of Middle and Northern California, Univ. 

 Calif. Publ. Bull. Dept. Geol., vol. 9, no. 15, 1916. 



4 English, Walter A., The Fernando Group near Newhall, California, Univ. 

 Calif. Publ. Bull. Dept. Geol., vol. 8, no. 8, 1914. 



5 Pack, E. W., and English, W. A., Geology and oil prospects in Waltham, 

 Priest, Bitterwater, and Peaehtree valleys, California, U. S. Geol. Surv. Bull. 

 581D, 1914. 



6 Anderson, F. M., and Martin, Bruce, Neocene record in the Temblor Basin, 

 California, and Neocene deposits of the San Juan District, San Luis Obispo 

 County, Proc. Calif. Acad. Sci., 4th ser., vol. 4, 1914. 



~> Merriam, J. C, Tertiary vertebrate faunas of the North Coalinga Eegion 

 of California, Trans. Am. Phil. Soc, vol. 22, pt. 3, 1915. 



s Merriam, J. C, New horses from the Miocene and Pliocene of California, 

 Univ. Calif. Publ. Bull. Dept. Geol., vol. 9, no. 4, 1915; Eelationship of Equus to 

 Pliohippus suggested by characters of a new species from the Pliocene of Cali- 

 fornia, vol. 9, no. 18, 1916. 



