EnnoRiAi.. 479 



Mr. J. I!. Hatthcr. tlic ( "urator of I'akonlology, and it is hoi)t;cl within 

 the \ear to coniplctc the work, whiih has ])roved itself to bean under- 

 taking attended with no small mechanical difficulties, which have all 

 been happily overcome. Recent discoveries show that the length of 

 this monster exceeded considerably the original estimates based upon 

 the first specimen collected by the Museum. The caudal vertebrae are 

 found to have been more numerous than was originally supposed, and 

 tar more numerous than is shown in the restoration of the caudal region 

 })ublished a few years ago by Professor H. F. Osborn. 



Thp: Director of the Museum has received recently, through the 

 kindness of Mr. S. E. Gill and Mr. G. Rutledge, the President and 

 Superintendent of the Parral and Durango Railway in Mexico, a num- 

 ber of specimens of the curious communal habitations built by the 

 larvte of Eucheira socialis Westwood, and has been enabled to make a 

 number of interesting observations upon the life-history of these 

 insects, which it is his intention shortly to publish with appropriate 

 illustrations in the Afri/io/rs of the Museum. 



Mr. J. A. Mrxsox has been employed to assist Mr. C. V. Hart- 

 man, the Curator of Archaeology and Ethnology, in the work of arrang- 

 ing and cataloguing the Costa Rican collections acquired by the latter 

 for the Museum. The \'elasco collection, which was deposited at the 

 Museum of Archaeology of the University of Pennsylvania in Phila- 

 delphia, has been brought to Pittsburgh. It is known that the collec- 

 tion of Costa Rican anticpiities at the Carnegie Museum now exceeds 

 in size all other collections from that country save only the collection 

 in the National Museum of Costa Rica at San Jose. There are more 

 Costa Rican anticjuities in the Carnegie Museum than there are in all 

 the other museums of the world combined. 



Thk Section of Mineralogy of the Museum has accjuired a fine series 

 of calcite crystals from Joplin, Missouri, among them one colossal pink 

 calcite twin, over fourteen inches in its longest diameter. 



Thp: Museum is deeply indebted to Mr. Henry Fairfield ()sl)orn, of 

 the American Museum of Natural History, for a reproduction in plaster 

 of Mr. Charles Knight's excellent and spirited model of the five-toed 

 horse, Protorohippiis, which has attracted a great deal of attention. 



