BEPORT OF NATIONAL MUSEUM, 1!>20. 113 



the subject of investigation, and a description of tlie mineral locali- 

 ties of Ynma County, Arizona, has been ])ublished. 



In paleontology, Secretar}^ AValcott has conii)leted and published 

 the results of his study of the Midide Cambrian algae from the Bur- 

 gess shale fauna, collected during the last ten years, a preliminary 

 report on which appeared in 191'2, and a similar sfiuly and report on 

 the Spongiae from the same horizon and region. In addition he 

 has prei)ared two papers, one a further study of the appendages of 

 the trilobite, and the other a study of the problematic Middle Cam- 

 brian crustacean, MaiTelhi^ discovered in the Burgess Pass fossil 

 (juarry. 



Mr. Frank Springer has continued his study on the fossil echino- 

 derms and completed the j)roof reading on his monograph of the 

 Crinoidea Flexibilia in course of publication by the Smithsonian 

 Institution. 



Dr. E. O. TJlrich has contimied his studies on the Ozarkian and 

 Cambrian fossils, and with Dr. C. E. Resser made a preliminary 

 examination of the large collection of Cambrian forms from Wis- 

 consin, mentione<l elsewhere in this report. Doctor Besser has con- 

 tinued his biV)liographic index of Cambrian fossils. 



Dr. B. S. Bassler, in association Avith Ferdinand Canu, completed 

 his monographic study of the fossil Bryozoa of the West Indies, the 

 results appearing in a i)uljlication of the Carne«ie Institution. They 

 liaAe also continued investigations on the fossil and recent Brj^ozoa 

 i the Museum collections. 



Dr. T. AV. Stanton lias continued work on tlie invertebrate faunas 

 of the Comanche series of the Cretaceous ])reparatory to a monograph 

 ow the subject, and has completed that on the fossils of the Cannon- 

 ball member of the Lance formation of the Dakotas. 



A report has been ])repared by Dr. ^lary J. Batiibun on the Cre- 

 taceous decapod crustaceans of Tennessee and one on the same 

 group from the Pacific Coast states aiul British Columbia is pro- 

 gressing. Doctor Bathbun lias also identified the crustaceans ob- 

 tained in B)B) in the Dominican Bepublic by Dr. T. W. Vaughan, and 

 prepared for publication descriptions of three new species. 



Dr. F. II. Knowlto.'i lias finished tlie study of the Museum's col- 

 lection of fossil plants from the DeiiAer formation, and Dr. W. H. 

 Dall has reported on the I'leistocene and Eocene fossils of the 

 Arctic coast collected by tlie Stefanson expedition. His report on 

 the fossils of the Nome Peninsula has been issued by the Geological 

 Survey, and the proofs read on liis i-evision of the recent and Ter- 

 tiary Brachiopoda. A list of the marine sliell-bearing moUusks of 

 tlie west coast of America from San Diego to the Arctic Ocean has 

 been j)repared and is now in the hands of the printer. Work has 

 9525°— 20 8 



