Jan., 1918. Annual Report or the Director. 



added value and importance on this account. This collection numbered 

 450 specimens. Through the kindness of Mr. Alpheus F. Williams, 

 General Manager of the De Beers Consolidated Mines Company of 

 Kimberley, South Africa, there was received from that Company an 

 interesting collection showing the rocks and minerals which accompany 

 the diamond in its occurrence at Kimberley. Some of the minerals, such 

 as zircon, olivine and garnet, received in this collection were of gem 

 quality. Specimens of the concentrates from which the diamond is 

 obtained were also included. The rocks received included melaphyre, 

 eclogite, shale, diabase, ''blue ground," and others indicating the char- 

 acter of the formation from which the diamonds are obtained. Another 

 valuable gift received was a collection of about 3,600 specimens of 

 invertebrate fossils and minerals from Charles F. Rauchfuss. The fos- 

 sils were principally from formations of Chester age in southern Illinois, 

 a region which before had been little represented in the collections. 

 The series of Pentremites and Archimedes in this collection was espe- 

 cially large and comprehensive, the Pentremites numbering nearly a 

 thousand specimens representing five determined and several un- 

 determined species, and the Archimedes numbering about one hundred 

 specimens representing at least ten species. A large series nimibering 

 about one thousand specimens representing more than seventy-five 

 species of fossil brachiopods from the Chester and other formations was 

 also included, and there were about four hundred specimens represent- 

 ing seventy-five species of fossil corals chiefly from the Falls of the 

 Ohio. A nimiber of producers of bog marl and similar substances used 

 in the manufacture of Portland cement in neighboring states, kindly 

 donated specimens of this material in order to increase the representa- 

 tion of these products in the Museum. The coiutesy of the following 

 firms is grateftdly acknowledged in this connection: Peerless Portland 

 Cement Company, New Egyptian Portland Cement Company, Neway- 

 go Portland Cement Company, New Aetna Portland Cement Company 

 Peninsular Portland Cement Company, and Wolverine Portland Cement 

 Company. Small collections of ores and minerals were presented by 

 Mrs. J. B. Ludlow and C. W. Pomeroy. Mr. Fred Patee presented a 

 number of specimens of highly modified hematite crystals from a new 

 locality in New Mexico. Several valuable accessions were received 

 through exchange. From Yale University there were thus received a 

 beautifully preserved skull with jaws and a partial skeleton of the short- 

 legged, aquatic rhinoceros, Teleoceras. This was from the well-known 

 locality at Long Island, Kansas. Besides its excellent state of preserva- 

 tion the form is of interest as being that of the last representative of the 

 rhinoceros family in America. From Amherst College there was received 



