MUSEUM OF COMPARATIVE ZOOLOGY. 23 



REPORT UPON THE MYRIOPODS, ARACHNIDS, AND 



WORMS. 



By Ralph V. Chamberlin. 



During most of the year, work was continued upon the myrio- 

 pods, particularly those of the National Museum collection. 

 Material from the West Indies and Central America claimed the 

 most time, and three papers were prepared as a result of its study. 

 The Julidae and Isobatidae of North America were revised. 

 Smaller collections were identified for various persons and insti- 

 tutions, scarcely a week passing without a call for service of this 

 kind. Important lots received during the year, but not yet 

 identified, were sent by the British Museum, the Raffles Museum 

 at Singapore, E. Jacobson of Fort de Kock, Sumatra, C. F. Baker 

 of the Philippines, and the California Academy of Sciences, the 

 material received from the last named institution being that col- 

 lected on the expedition of 1921 to the islands of the Gulf of Cali- 

 fornia. 



Work upon the arachnids was restricted to the identification of 

 smaller lots, A short paper was prepared upon material collected 

 in southern Utah by Prof. V. M. Tanner, who is continuing his 

 collecting in that region, and one upon the Linyhiidae of St. Paul 

 Island, Alaska. Part of June and July was spent in field-work 

 in northern Utah, and in studying, in conjunction with Mr. J. C. 

 Chamberlin, the latter's collection of California spiders. The 

 spiders secured by the expedition of 'the California Academy of 

 Sciences, previously mentioned, were received for report. A large 

 collection of spiders made in Louisiana was received for study 

 from Mr. H. E. Hubert. 



Sipunculids were received for identification from the U. S. 

 National Museum and from Miss M. Johnson. 



For other material, the Museum is indebted to Messrs. G. G. 

 Ainslie, J. C. Chamberlin, C. R. Crosby, W. A. Hilton, C. W. 

 Howard, H. E. Hubert, A. G. Huntsman, M. D. Leonard, E. R. 

 Sasscer, J. O. Snyder, and W. M. Wheeler. 



