Vol. VII] BERRY— WEST AMERICAN CHITONS 231 



Where possible a series of duplicates, including paratypes 

 of the new species, has been deposited in the collection of the 

 California Academy of Sciences. 



Mr. Willett has also generously permitted my personal 

 retention of a considerable series of specimens, further data 

 from which are accumulating and will be ofifered on a subse- 

 quent occasion. 



Below is given a systematic list of all the species so far 

 identified. Following the list are given notes on the various 

 forms with a memorandum of the localities at which they 

 were obtained, and such ecologic data as are now possible. 



Systematic List of Species. 



No. of Specimens 



Family Lepidopleuridse 



Genus Leptochiton Gray, 1847. 



1.) L. canccllatiis (Sowerby, 1839) 13 



2.) L. sp. near rugatiis ("Carpenter," Pilsbry, 



1892) 35 



Family Callochitonidae. 



Genus Tonicclla Carpenter, 1873. 



3.) T. ruber (Linnaeus, 1767) 15 



4.) r. /nimfa (Wood. 1815) 65 



5.) T. suhmarmorca (Middendorff, 1846) 21 



Genus Cyanoplax (Pilsbry, 1892) 

 6.) C. raymondi (Pilsbry, 1894) 12 



Genus Schizoplax Dall, 1878. 

 7.) S. hrandtii (Middendorff, 1846) 66 



Family Ischnochitonidae. 



Genus Ischnochiton Gray, 1847. 



8.) /. interstinctiis (Gould, 1852) 135 



9.) /. radians Carpenter, 1892 8 



10.) /. (Lepidosona) rctiporosus Carpenter, 1864. . 36 



