MUSEUM OF COMPARATIVE ZOOLOGY. 23 



REPORT UPON THE MYRIOPODS, ARACHNIDS, AND 



WORMS. 



By Ralph V. Chamberlin. 



During the year the polychaetes secured by the Canadian Arctic 

 Expedition, 1913-1918, and other annelid material from northern 

 and Arctic regions received for study from the Canadian Geologi- 

 cal Survey were identified and a report prepared. The gephyreans 

 of the Canadian Arctic Expedition were also reported upon. A 

 collection of polychaetes made by the Curator on the California 

 Coast in 1909 was identified. The Museum is indebted to Prof. 

 W. A. Hilton for many additional specimens of annelids from the 

 southern California coast. Further material from Canadian 

 waters was received from the Canadian Geological Survey. 



Accessions of arachnids were received during the year from 

 Miss E. B. Bryant who has continued her work upon the collections 

 and from Messrs. H. A. Allard, S. C. Chamberlin, J. H. Emerton. 

 During the year the Curator identified a collection of Chinese 

 spiders received through the U. S. N. M., the collection of spiders 

 from southern California made by Prof. W. A. Hilton and students, 

 and a collection of spiders made chiefly in Utah in 1917 by the 

 Curator. 



One week was spent in Washington at the U. S. N. M. in exami- 

 nation of the myriopod collections. Through the courtesy of the 

 Museum these collections have been sent to the Museum for 

 study. The American Museum of Natural History has also sent 

 for a similar study the myriopods collected during the Belgian 

 Congo Expedition. To Prof. O. F. Cook the Museum is indebted 

 for African myriopods loaned from his personal collection. Speci- 

 mens have also been received from the Canadian Geological Survey, 

 Miss Edith M. Patch, and Messrs. J. M. Aldrich, Paul Bartsch, 

 C. R. Crosby, J. J. Davis, C. G. Hewitt, W. A. Hilton, L. O. 

 Howard, W. A. Riley, and E. A. Sasscer. 



Routine work included the identification of various minor lots 

 of myriopods. A beginning was made on a study of the chilopods 

 and diplopods of the East Indies. 



