PROCEEDINGS 



OF THE 



CALIFORNIA ACADEMY OF SCIENCES 



Fourth Series 



Vol. VII, No. 10, pp. 229-248, 4 text figures. September I, 1917 



X 



NOTES ON WEST AMERICAN CHITONS ~I* 



BY S. STILLMAN BERRY, REDLANDS, CALIFORNIA 



1. Notes on Chitons Collected by Mr. George Willett 

 IN Southeastern Alaska 



In the present paper are given the preliminary results of 

 the examination of a considerable series of chitons collected 

 by Mr. George Willett in southeastern Alaska during the 

 summers of 1913 to 1916, inclusive. Although chiefly occu- 

 pied with other business, his personal interest in the group 

 caused Mr. Willett to devote odd moments to the collection 

 of mollusks, both on shore and, by means of a small dredging 

 outfit, in depths down to 50 or more fathoms. The Polypla- 

 cophora comprise an important part of the spoils obtained, 

 both individuals and species being extensively represented. 

 Mr. Willett has generously placed at my disposal for investi- 

 gation the entire series of over 600 specimens, along with 

 certain verbal field observations of sufficient ecological inter- 

 est that I have quoted from them freely. A small portion of 

 the material was fortunately preserved in alcohol and has 

 proved invaluable, though not all the species taken are repre- 

 sented in this way and several interesting problems must 

 therefore go over until further material can be obtained. 



• Printed from the John W. Hendric Publication Endowment. 



September 1, 1917 



