MUSEUM OF COMPARATIVE ZOOLOGY. 21 



REPORT ON THE MYRIOPODS, ARACHNIDS, AND 



WORMS. 



By Ralph V. Chamberlin. 



About two weeks were spent in the field in Millard Co., Utah, 

 where intensive collecting of the arachnids of the desert region 

 and certain isolated mountains was carried out in continuation 

 of previous field-work in the Great Basin region. 



Considerable time was devoted to a study of the collections 

 of chilopods and diplopods from the" West Indies and the islands 

 of the Pacific, and a report prepared upon the myriopod fauna of 

 each of these regions. This work resulted in the addition of 

 more than three hundred new types. A report was prepared 

 upon the myriopods from Louisiana and Okefenokee Swamp 

 received from Cornell University through Prof. C. R. Crosby; 

 several briefer papers on other collections were also prepared. 



Accessions of chilopods and diplopods were received from Messrs. 

 C. R. Crosby, W. J. Crozier, H. F. Dietz, E. O. Essig, H. J. Hart, 

 W. A. Hilton, L. O. Howard, P. Rau, E. R. Sasscer, H. J. Smith, 

 and the Southern Biological Supply Co. through Percy Viasco. 



An extensive collection of spiders from southern California 

 made during a series of years by Prof. W. A. Hilton and his 

 students was received during the year. Series of the species 

 are to be retained in return for identification. Several small lots 

 of arachnids, chiefly foreign, were also identified. Spiders were 

 also received from Messrs. Joseph Chamberlin, C. L. Marlatt, 

 Joseph Robinson, and Miss Edith Jamieson. 



Work on the annelids included the identification of material 

 taken by Mr. Alexander Agassiz on the Pacific Coast in 1859-1860 

 and of an extensive and highly interesting collection made by 

 Prof. W. A. Hilton on the California coast at and near Laguna 

 Beach. Professor Hilton has kindly consented that the types of 

 the more than forty new species shall be retained by the Museum. 

 Several smaller collections were also identified and catalogued. 



Through the agency of Mr. F. Johansen, the Museum received 

 from the Canadian Geological Survey the annelids secured by the 

 Canadian Arctic Expedition for study and report. In return for 



