66 Report of the President 



GEOLOGY, GEOGRAPHY AND PAST LIFE OF THE 



EARTH * 



Edmund Otis Hovey, Curator 



The rearrangement of the historical and biological series of 

 fossils had advanced so far that in March the exhibition hall 

 was reopened to the public. Four additional up- 

 Exkibition right cases were prepared to the point of con- 

 structing the wire frame for the background for 

 the reception of topogeologic models. The hypothetical land 

 and sea areas have been painted on the eight paleogeographic 

 models of North America. 



The core of the White Mountains, New Hampshire, model 

 was finished early in the year and that of the Porto Rico region 



was prepared. These, together with those of the 

 Topogeologi- Mt. Holyoke Range, Massachusetts, region, Wat- 

 Models kins Glen region, and Standing Stone, Tennessee, 



region, which were completed earlier, were put 

 into the hands of Morgan Brothers for modeling, and all five 

 are promised for installation early in 192 1. The core of a 

 similar relief model of the Yosemite Valley will be ready for 

 modeling early in 1921. 



The arranging and labeling of exhibition specimens has been 

 advanced, particularly in the sponge, coral, graptolite, cephalo- 

 pod, trilobite, echinoderm and stratigraphic ex- 

 Labeling and hibits. Catalogue cards for the pelecypod exhibit 

 Work° gUC have been completed, also for the Schrammen 

 exhibit of fossil sponges in the type series, and 

 progress has been made in carding the Whitfield catalogue 

 of invertebrate fossils. 



The Curator revised and brought up to date, with the help of 



* Under the Department of Geology and Invertebrate Palaeontology (see also 

 pages 210 to 212). 



