INTRODUCTION. 



This catalogue includes all t3'pe-specimens of mammals known to be 

 in the U. 8. National Museum on July 1, 1908. It embraces, besides 

 the general collection in the Division of ]Mammals, the large collection 

 of American mammals made by the Bureau of Biological Survej'^ of 

 the U. 8. Department of Agriculture. The hitter collection is kept 

 in a special hall of the Museum and is under the direct charge of the 

 chief of the Biological Survey. In the preparation of this catalogue, 

 one author has represented the Division of .Mammals and the other the 

 Biological Survey, and, though each is responsil)le onl}- for the facts 

 concerning the types in the collection with which he is officially con- 

 nected, the entire manuscript and proof have passed through the 

 hands of both authors. The joint authorship has had correspond- 

 ingly the joint direction of Dr. F. W. True, head curator of biology 

 and curator of mammals, U. S. National Museum, and Dr. C. Hart 

 Merriam, chief of the Bureau of Biological Survey, U. S. Department 

 of Agricidture. Dr. True has in addition contributed all the facts 

 concerning the types of cetaceans and has read the entire ])roof. It 

 should be said also that this catalogue w^as begun in the Division 

 of Mammals eight years ago, under the direction of Mr. Gerrit S. 

 Miller, jr., assistant curator of manunals. 



The list includes types (or holotypcs) and cot3'pes, and lectotypes 

 and chirotypes, as defined b}^ Thomas (Proc. Zool. Soc. London, 1803, 

 pp. 2-tl-L>42) and Schuchert (Bull. U. S. Nat. Mus.. 5;}, Pt. 1, pp. 7-18). 

 Appended to the main list of the tj'^pes now in the Museum is a smaller 

 one, comprising those which, according to the records, should be in 

 the national collection, but which have been lost or destroyed by 

 various accidents. 



The name of the species, or subspecies, is given as it occurs in the 

 original description, followed by a reference to the place and date of 

 its publication. This is followed, when necessary owing to changes 

 made by sul)se(iuent authors, l)y the name now currently used foi- the 

 species or sul)species. The current name is preceded by the sign of 

 equality ( = ) and followed by a citation of the authority for its use, if 

 such has been found. 



The citations ai-e followed i)\: (i) jMuseum catalogue immber. (2) 

 Nature of specimen, whether skin and skull, or skull only, or skin only, 



