VOLUME TWELVE NUMBER ONE 



JOURNAL 



OF 



ENTOMOLOGY 



AND 



ZOOLOGY 



MARCH, 1920 



PUBLISHED QUARTERLY BY 

 POMONA COLLEGE DEPARTMENT 0/ ZOOLOGY 



CLAREMONT, CALIFORNIA, U. S. A. 



CONTENTS 



Page 



NEW CALIFORNIA SPIDERS— «a/;)A V. Chamberlain 1 



CENTIPEDES AND MILLEPEDES FROM NEAR CLAREMONT 24 



SPIDERS FROM CLAREMONT-LAGUNA REGION 25 



CENTRAL NERVOUS SYSTEM OF MYTILUS CALIFORNIANUS 



William A. Hilton 27 



NOTES ON THE SIPUNCULIDA OF LAGUNA BEACH 



Ralph V. Cha mherlain 30 



Entered Claremont, CaK.Post-Office Oct. 1, 1910. as second-class matter, under Act of Congress of 

 March 8, 1878 



