REPORT OF NATIONAL MUSEUM, 1918. 61 



and no less than 49 are sufficiently well preserved to be identified spe- 

 cifically, 16 being types of new species. In addition, four well- 

 preserved turtles were acquired by purchase; an unusually perfect 

 specimen of box turtle, described by Dr. O. P. Hay as the type of 

 T erra/pene whitTieyi, was presented by Prof. F. H. Whitney, of the 

 University of Texas, Austin, Texas; and an example from the Cre- 

 taceous of Georgia, valuable chiefly on account of the rarity of such 

 specimens from that section of the country, was deposited by the 

 Geological Department of the State of Florida. 



Fossil bones of the mammoth, rhinoceros, and horse were collected 

 for the Museum in Siberia by Mr. John Koren, to supplement the 

 material obtained by the Koren Expedition in 1914—1915. Among 

 these is a beautifully perfect mammoth humerus over 3 feet in length, 

 indicating an animal of magnificent proportions. Other accessions 

 of value are a partial skeleton of a Cretaceous plesiosaur, presented 

 by Mr. P. Balgord, Wheaton, Montana, and a skull of a fossil horse, 

 collected in Alaska by Mr. George L. Harrington and transferred 

 by the United States Geological Survey. 



Mr. C. W. Gilmore, assistant curator of fossil reptiles, was in 

 March appointed associate curator and put in charge of the labora- 

 tory and exhibition work of the section of vertebrate paleontology. 

 This change has proven of great advantage to the section in further- 

 ing the exhibition work. 



The skeleton of Dimetrodon, mentioned in the last report as be- 

 ing prepared for exhibition, has been entirety freed from the matrix, 

 the missing parts restored, and the mounting of the specimen about 

 completed. It proves to be the most perfect skeleton of Dimetrodon 

 (jigas yet discovered. The large head, jaws armed with long, 

 pointed teeth, and the high dorsal spines make this one of the most 

 curious of all extinct reptiles, and it will form a striking addition to 

 the exhibition series. A hundred or more separate bones belonging 

 to this collection of Permian reptiles from Texas have also been pre- 

 pared and placed in the study series. 



The preparation of the turtle specimens collected in northern 

 New Mexico by Mr. J. B. Reeside, jr., begun last year, was com- 

 pleted. All of the best specimens have been restored and are now 

 available for exhibition. 



The practical completion of the work on the Titanothere material, 

 which has extended over several years, has made possible the as- 

 sembling of the entire collection for identification, classification, 

 labeling, and cataloguing, which has been done with the cooperation 

 of Prof. Henry Fairfield Osborn and Dr. William K. Gregory. Six 

 genera and 24 species are represented in the collection, which com- 

 prises several hundred specimens, including more than 100 more or 

 less complete skulls, and it can be definitely said that it is the finest 



