114 EEPOKT OF ]SrATIOXAL MUSEUM, 1[)20. 



been commenced on the fauna of the Hawaiian Ish^nds, Pleistocene 

 and Eecent. 



Mr. Gilmore has completed his monographic study of the carniv- 

 orous dinosaurs in the collections, and the results are in course of 

 publication as a special bulletin of the Museum. He has also pub- 

 lished a short article on the discovery of an Ornithomimid dinosaur 

 in the Potomac formation of Maryland, and a paper giving the re- 

 sults of a study of all the Poton.ac reptilian materials is Avell under 

 way. 



Mr. Gidley reports progress in the study of the Fort Union mam- 

 mals and has apparently established the fact that two or three rela- 

 tively diversified groups of true primates existed in western Xorth 

 America during that geological period, several species of which are 

 represented in our collections. But little has been done in continua-. 

 tion of jNIr. Gidley's study of the Cumberland cave carnivores begun 

 last 3"ear OAving to the unprepared condition of the material. 



Prof. E. W. Sayles of Har\ard University was engaged for some 

 Aveeks in Januar}^ examining the slates of the collection with especial 

 reference to possible evidence of seasonal banding, a problem upon 

 which he is now engaged. Dr. August F. Foerste of Dayton, Oliio, 

 spent several weeks in a .study of the collections of Silurian cepha- 

 lopods; Prof. W. H. Shideler, professor of geology at INIiami Uni- 

 versity, Oxford, Ohio, was occupied from February to June in an 

 examination and study of the Upper Ordovician and Lower Silurian 

 fossils from the Ohio Valley; Prof. O. A. Thomas of the University 

 of Iowa, has studied the fossil echinoderms; and Prof. G. jNI. Ehlers 

 of the University of Michigan, has been similarly engaged on the 

 fossil corals. Dr. Arthur Hollick spent some months studj'ing the 

 fossil plant collections and is now bringing his work on the Cretace- 

 ous floras of Alaska to a conclusion. The plant collections have also 

 been studied by Prof. E. W. Berry of Johns Hopkins University, 

 Dr. Harvey Bassler of the U. S. Geological Survey, and Dr. G. IJ. 

 Wieland of Yale University. 



Cooperation with the Maryland (xeological Survey has resulted 

 in the publication of a volume on the Cambrian-Ordovician roclcs 

 of ^Nlarjdand, in which the paleontological Avork is ba.sed on Mu- 

 seum specimens; Prof. T. D. A. Cockerell has continued coopera- 

 tion Avith the diA'ision in his study of the collection of Eocene 

 insects; and Dr. O. P. Hay. Avorking under the auspices of the 

 Carnegie Institution, has continued his .studies on the American 

 Pleistocene faunas, as in years past. 



Other Avorkers Avho have studied the collections are iNIr. M. A. 

 HoAve of the Xcav York Botanical Gardens; Dr. J. A. Ciishman, 

 Bo.ston Society of Natural History; Dr. P. T. Jackson, Peterboro, 

 NeAv Hamx^shire; Dr. Charles Mook, American Museum of Natural 



