178 REPORT OF NATIONAL MUSEUM, 1893. 



foriruitioii, exclusive of tliose on which Prof, Fontaine based his mono- 

 graph ou tlie Younger Mesozoic Flora of A'irginia, now All 113 of the 

 standard unit trays of the National Museum. These later specimens 

 have come from Alabama, Virginia, the District of Columbia. ^Nlary- 

 laiul, and Xew Jersey, and, combined with the earlier ones, malie 

 jtrobably as complete a flora as that known for any formation. The 

 results of their study will be embodied in a work on the correlation of 

 the Cretaceous plants, now in preparation. 



Besides the work of revision above mentioned, Prof. Knowlton has 

 also studied collections and made reports as follows: lie-examination of 

 the fossil plants at Silver Cliff, Colo. ; list of the plants of the Post-Lara- 

 mie beds of Colorado; report on a collection of fossil plants from Ellens- 

 burg, Wash. ; report on fossil plants obtained by J. S. Diller in western 

 Washington ; report on two species of fossil plants fiom ( )regon ; identi- 

 fication of a collection of fossil i)Iants from the auriferous gravels of 

 California, obtained by H. W. Turner; report on the bearing of the fossil 

 plants of the auriferous gravels on the tjuestion of the temperature and 

 elevation at the time of their deposition; determination of fossil plants 

 collected by W. H. Weed in the Crazy Mountains on Big Timber Creek, 

 Park County, Mont. ; report on collection of fossil plants from Cookville, 

 Utah; report on fossil i^lants from Huefano Park, Colorado, as well as 

 numerous reports relating to accessions received by the Museum. 



Prof. William M. Fontaine, of the University of Virginia, has studied 

 and made an elaborate report on a collection of plants from the Trinity 

 rocks near Glen Kose, Tex. He has determined no less than 23 species, 

 of which number 6 are new to science. His paper, illustrated by 8 plates, 

 is published in the proceedings of the National Museum. 



The last catalogue entry in June, 1892, is 555. 



The last catalogue entry in -Tune, 1893, is 581. 



Total number of specimens added to the collection during the year 

 is estimated at 2,000. 



DEPARTMENT OF MINERALS. 



Prof. Clarke reports that apart from the usual routine little Mas done 

 in the department except to i)repare, pack, and install its share of the 

 exhibit made by the Museum at the World's Columbian Exposition. 

 To that work all else was subordiimted. The preparation of the crys- 

 tallographic series for Chicago, by Mr. W. S. Yeates, involved the care- 

 ful measurement and description of a large number of characteristic 

 crystals, representing many mineral S})ecies. The data thus obtained 

 appear upon the printed labels of the specimens, whicli have thus 

 acquired new value for the jjernianent collection. Toward the end of 

 April Mr. Ideates went to Chicago to install the collection ; l)ut early 

 in May he resigned as assistant curator, to become State geologist of 

 Georgia, and the work of installation was completed by ^Ir. Wirt Tassiu 

 and the Curator. The collection shown at the Exp<»sition lilled 2 



