EEPORT OF ASSISTANT SECRETARY. 



45 



The study series contains the material which appeals exclusively to 

 the specialist. It comprises those specimens which serve to illustrate 

 the occurrence and associations of a mineral in any one locality and 

 which are not needed for the exhibition series, or which are not 

 unnecessary duplicates of material alread}^ on hand. Each specimen 

 in this series is numbered, lalieled, and contained in a paper tray. 

 The several specimens are then arranged geographically by species; 

 the species are arranged in groups, as in the systematic series, and 

 placed in drawers. This series also includes all the original and type 

 material belonging to the division which is not needed for exhibition. 

 Those types used in the exhibition .series are here represented by cards 

 giving the position of the type specimens in the cases. 



Little has as yet been done in the way of permanently installing 

 the exhibition series of vertebrate fossils, -owing to the construction 

 of new cases and the absence of Mr. F. A. Lucas, the Curator, for 

 several weeks in New Haven. The death of Professor Marsh involved 

 the immediate withdrawal and turning over to the Museum of the 

 vertebrate fossils collected under the direction of the Geological Sur- 

 vey, which work has naturally taken a large share of the time and 

 attention of the Curator since March. This collection will be referred 

 to again in the next report. 



The final arrangement of the collection of invertebrate fossils has 

 l)een delayed by the need of cases. The entire Paleozoic portion has 

 been removed from tlie floor of the southwest court and placed on the 

 gallery in the .same court. This installation is not, however, final. 

 AYith the completion of the rail cases, it is hoped to remove from the 

 floor of this court the Mesozoic and more recent invertebrate fossils, 

 thereby making room for the collections in vertebrate paleontology^ 

 At present, the mounted exhibition series in this section consists only 

 of Cambrian, Upper Carboniferous, and Tertiary forms. Mr. Charles 

 Schuchert has labored most industriouslv, and reports that, with the 

 assistance of Mr. Williard, he has during the year placed in final 

 Museum form upward of 20,000 specimens and prepared 2,900 cata- 



