64 EEPORT OP NATIONAL MUSEUM, 1912. 



also entered into arrangements to describe the Ostracoda and Bryozoa 

 for two monographs of the Geological Survey, one on the paleontol- 

 ogy of the Atlantic coastal plain, the other on the geology and pale- 

 ontology of the Panama Canal Zone. Dr. AVilliam H. Dall, associate 

 curator, reports progress on a monograph of the fossils of the Silex 

 beds of the Oligocene of Florida. Mr. L. D. Burling, assistant 

 curator, was mainly occupied in editing and indexing Secretary Wal- 

 cott's monograph on the Brachiopoda, but also continued work on a 

 bibliography of the Cambrian and Ordovician geology and paleon- 

 tology of the Cordilleran region, the Ordovician fauna of Colorado, 

 and the Cambrian Brachiopoda represented in the Museum collec- 

 tions, and on a preliminary manuscript for a report on the Ordovician 

 section near Glenogle, British Columbia. 



Mr. C. W. Gilmore, assistant curator of fossil reptiles, published 

 on the two skeletons of Gcmiptosauriis^ recently mounted under his 

 direction for the Museum, and a paper descriptive of a new genus 

 and species of Mosasaur from the Cretaceous of Alabama. He also 

 fini:?hed a report on the fossil batrachian, reptilian, and avian re- 

 mains of North Carolina, had in preparation an account of a new 

 fossil gavial from Georgia, and made some progress with his study 

 of the dinosaurian genera Ceratosaunis and Stegosaurns. Mr. J. W. 

 Gidley, assistant curator of fossil mammals, brought nearly to com- 

 pletion three papers on mammalian material under his charge. Dr. 

 A. C. Peale, aid in paleobotany, submitjted for publication *n im- 

 portant paper on tlie stratigraphic position and age of the Judith 

 Kiver formation, based on field work and collections made during the 

 summer of 1011. 



In response to requests from outside sources, 451 lots of geological 

 specimens were examined and identified, and reports furnished on 

 their character and value. 



Exj)lorations. — No field work in geology was undertaken directly 

 by the Museum. The Middle Cambrian rocks of western Canada 

 were again the subject of investigation by Secretary Walcott. who 

 visited the practically unexplored Mount Eobson region of Alberta 

 and the famous fossil' locality at Burgess Pass, British Columbia, 

 lender a grant from the Smithsonian Institution, Mr. L. D. Burling 

 continued explorations in British Columbia, Manitoba, and New 

 York, returning with large collections of Cambrian and Ordovician 

 fossils. A study of the Judith River formation in Montana, result- 

 ing in the collection of many Cretaceous fossils, was made by Dr. 

 A. C. Peale at his own expense, aided by a small allowance from the 

 Museum. While at Burlington, Iowa, in the summer of 1911, super- 

 intending tlie packing of the Springer collection, Dr. R. S. Bassler 

 made several collecting trips in that vicinity. 



