Vol. IX] SMITH— CLIMATIC RELATIONS 159 



This fauna is of upper Miocene ag-e, and probably represents 

 the whole of that epoch. It has about 25 per cent of Recent 

 species, and 75 per cent extinct. The abundant Lyropecten, 

 giant Ostrea, Astrodapsis, Trophon, Ficus, and Dosinia indi- 

 cate subtropical conditions as far north as Mt. Diablo in mid- 

 dle California. North of that locality the fauna is unknown. 



Monterey-Temblor. Since the work of Conrad in the Pacific 

 Railroad Reports, and of Gabb in the Palaeontology of Cali- 

 fornia, vol. 2, many workers have contributed to the knowledg^e 

 of the Monterey fauna. Among them have been : Frank M. 

 Anderson,^^ who has devoted himself especially to the study 

 of the Temblor phase of the Miocene of the middle Coast 

 Ranges and The Kern River deposits near Bakersfield; 

 R. Arnold, ^^ who has given special attention to the fauna in 

 the oil fields of the southwestern part of the San Joaquin 

 Valley, and of southern California. Anderson, in his various 

 papers, has called this fauna the Temblor, while Arnold has 

 called it Vaqueros. Most workers in West Coast stratigraphy 

 are now agreed that the Temblor fauna is not synchronous with 

 the Vaqueros, but does agree with the Monterey, upper part 

 of, lower Miocene. 



The most important species of the Monterey-Temblor are : 

 Scutaster andersoni Pack, Scutella fairbanksi Arnold, Scutella 

 merriami Anderson, Scutella norrisi Pack, Linthia calif ornica 

 Weaver, Area devincta Con., Area microdonta Con., Arca- 

 obispoana Con., Area trilineata Con., Amiantis conradiana 

 And., Amiantis diabloensis And., Cardium quadrigenarium 

 Con., Cardium vaquerosense Arn., Chione mathezvsoni Gabb, 

 Chione panzana And., Corbicula dumblei And., Dosinia conradi 

 Gabb, Dosinia mathezvsoni Gabb, Dosinia ponderosa Gray, 

 Glycimeris branneri Arn., Macoma ocoyana Con., Macoma 

 arctata Con., Marcia oregonensis Con., Metis alta Con., 

 Modiolus multiradiatus Gabb, Mulinia densata Con., Mytilus 

 expansus Arn., Nucula conradi Meek, Ostrea eldridgei Arn., 

 Ostrea titan Con., Panopea estrellana Con., Panopea generosa 



" A stratigraphic study in the Mount Diablo Range of California, Proc. Calif. Acad. 

 Sci., Third Ser. Geol., vol. 2. No. 2, 1905, pp. 156-248; The Neocene deposits of Kern 

 River, etc. Proc. Calif. Acad. Sci., 4th Sen, vol. 3, (1911), pp. 73-148; and Anderson 

 and Martin, Neocene record in the Temblor basin, etc., Proc. Calif. Acad. Sci., 4th 

 Ser. Vol. 4, pp. 15-112 (1914). 



»3Bull. 309, U. S. Geol. Survey, (1907); Prof. Paper No. 47, U. S. Geol. Survey, 

 (1906) Bull. 322, U. S. Geol. Survey (1907); Bull. 396, U. S. Geol. Survey (1909); 

 and Descr. New Cretaceous and Tertiary fossils, etc., Proc. U. S. Nat. Mus., vol. 34, 

 No. 1617, (1908), pp. 343-389. 



