38 Bulletin Santa Barbara Society of Natural History. Vol. I. 



north and south, it does furnish a large and interest- 

 ing list of specific forms, and a number of species 

 which are rarely, if ever, found at other localities on 

 the coast of California, and some which are restricted 

 to our county only. 



From the varied character of the coast of the main 

 land and the islands forming the southern line of the 

 so-called Santa Barbara Channel, many species find 

 conditions favorable to their well being. 



The Santa Barbara Channel formed by the coast of 

 the main land on the north and the Islands of San Mi- 

 guel, Santa Rosa, Santa Cruz and the Anacapas (the 

 last named being in Ventura County) on the south, 

 form a neutral ground upon which a large number of 

 species of the northern and southern faunas meet or 

 overlap; the limits herein given however, will doubt- 

 less be greatly modified or extended, as the coast be- 

 comes more thoroughly examined, and many new dis- 

 coveries will also result from the same cause. 



In the following list I have restricted the species 

 known to exist within the limits of this County, to such 

 as I have collected or examined, and those which are 

 specified in Dr. J. G. Cooper's "Geographical Cata- 

 logue of the Mollusca," as having been found in this 

 County, leaving out such as are doubtful or are only 

 put down as extending from some point north of us to 

 some other point lying south of the region under con- 

 sideration; leaving it to others who may come after me 

 to make such additions and corrections as their knowl- 

 edge may enable them to do; taking this "list" crude 

 and imperfect as it is, for a groundwork to start from, 

 and if this object is attained, the compiler will feel that 

 he has accomplished the purpose for which it was in- 

 tended. 



Any criticisms or additions to this list if sent to the 

 writer will be gratefully received. 



The arrangement is similar to Dr. Cooper's cata- 

 logue before mentioned, which was published by our 

 State Geological Survey, and still remains the best 

 catalogue of the Mollusca of the coast of California, 



