NEOCENE STRATIGRAPHY. 359 



the North Atlantic, but are not known living in the Pacific. 



Many species are found in Japan and Kamtschatka, 

 which are common on the west coast of North America. 

 Among these may be mentioned: Aniusiiim caurimim 

 Gld., Cardiuni cordis Mart., Crepidula aculeata Gmel., 

 Chrysodomus carinatiis Dunker, Cry;ptochiton sielleriMidd. , 

 Glycimeris generosa Gld., Laqiieus Californiciis Koch., 

 Leftothyra sanguinea Cpr., Lima dehiscens Con., Lucina 

 horealis Linn., Siliqiia -patiila Dixon, Macoma edidis 

 Nutt., Af. secta Con., M. nasiUa Con., Mytilus ediilis 

 Linn., Natica clausa Brod. & Sby., Placunanoniia macro- 

 chisnia Desh., Priene oregonensis Redf., Saxidomiis nut- 

 talli Con., Siphonalia kelletii Fbs., Solen siccai'iens Gld., 

 Tellina bodegeiisis Hds. 



Local Divisions. — On the coast of California the dis- 

 tribution of species, so far as known, suggests several 

 local divisions of the California province. One extending 

 from San Diego to Santa Barbara county. From a list 

 of the Mollusca of Santa Barbara county, by Dr. S. G. 

 Yates,* it is found that Santa Barbara county is the 

 northern limit of about seventy species, aside from the 

 strictly local fauna. It is also the southern limit of about 

 sixty species. It is next found that the Bay of Monterey 

 marks the northern limit of a large number of species, 

 and suggests a division extending from the Bay of Mon- 

 terey to Santa Barbara county. It is probable that Santa 

 Catalina Island should be included in this division as well 

 as the Santa Barbara Islands. 



From the Bay of Monterey to Bodega Bay seems to 

 mark another division, but the nothern limit may be such 

 simply because of lack of observations further north. 

 Little data is at hand on the faunas between Bodega Bay 

 and Washington. 



*Bull. Sta. Barbara Soc. Nat. Hist., vol. i, No. 2, p. 37. 



