1912] Martin : Type Locality of Monterey Series in California 147 



tomaeeous shale greatly predominates. In the lower portions 

 the cherty and arenaceous phases are quite common. Besides 

 these there are variations of local importance, as they are 

 the phases from which the greater number of the fossil marine 

 invertebrates were obtained. One of these localities occurs along 

 the Pacific Improvement Club's driveway approximately one and 

 one quarter miles northeast of Carmelo Bay. Here a section is 

 exposed in which the strata are dipping toward the northeast at 

 an angle of ten or fifteen degrees. The base of the section con- 

 sists of yellowish-brown limestone and calcareous sandstone which 

 grades upward into a purple, fine-grained sandstone. A short 

 distance above the fine-grained sandstone the typical bituminous 

 shale was encountered, conforming in strike and dip to the strata 

 in the lower portion of the section. As this locality occurs along 

 the western border of the shale area it is believed to be near the 

 base of the series. The limestone yielded eight species of fossil 

 invertebrates. Another locality of equal importance was en- 

 countered in the bed of a deep canon two miles due south of Mon- 

 terey. Here a friable, fine-grained, gray sandstone outcrops 

 beneath the well-stratified shale. Since this sandstone is only a 

 short distance, horizontally, from the granite it seems certain 

 that its stratigraphic position is not far distant from the base of 

 the series. Like the former locality it yielded a small collection 

 of marine molluscs. 



FAUNA OF THE TYPE LOCALITY 



As is usually the case with the shale formations, the Monterey 

 of the type locality contains relatively few species, though the 

 number of individuals may be large. Casts of small bivalves and 

 univalves are of common occurrence throughout the formation, 

 but the specific and generic characters are not determinable in 

 most cases. The total number of species so far reported from 

 the beds at Monterey does not exceed fourteen, of which six are 

 here reported for the first time. The following species, arranged 

 according to the horizons from which they were obtained, com- 

 prise the known mollusean fauna of the type section of the Mon- 

 terey. Cetacean bones, foraminifers, diatoms, and remains of 

 small crustaceans are also known from these beds. 



