INTRODUCTION. 



of the types and co-types of the recognized species and varieties 

 may be of interest : — 



Macropodidfe . . 

 Phalangeridae . . 

 PhascolomyidsB 

 Peramelida; .. 



Dasyuridse 



DidelphyidsB .. 

 Monoti'emata .. 



MuBeumB of 



Museum.I''''--S^'5"«y-I'^y^«"- <^«°°''- tS ^'™"''- ^«'■""• 



31 10 3 3 1 1 



14 5 2 2 4 1 

 0000 00 00 

 6 4 3 10 



15 1 1 3 2 1 

 7100 41 



10 1 1 



Total 74 21 8 8 7 6 4 3 



There are also two types in the Melbourne Museum, and one 

 each in the Museums of Copenhagen, Munich, Eio Janeiro, and of 

 the College of Surgeons and the Geological Society of London. 

 The types of 40 species are not traceable.* 



This comparative richness of the British Museum, both in 

 specimens and types, is largely due to the accession of the col- 

 lection of Australian Mammals formed by the late Mr. John Gould, 

 which contained not only a complete set of the types of the many 

 species described by him, but also fine series of all the Australian 

 Mammals he obtained. 



Next in importance to the Gould Collection come those of 

 Sir George Grey from South Australia, and of Mr. KonalJ Gunn 

 from Tasmania, both containing many valuable typical specimens 

 described by Dr. J. E. Gray, and both presented by their respective 

 collectors to the Museum. 



Of the other donors of specimens included in the present 

 Catalogue, special mention may be made of Lord Derby, Dr. G. 

 Bennett, Messrs. 0. Salvin, F. D. Godman, John Macgillivray, 

 and F. M. Eayner. 



In this Catalogue, probably for the first time, double synopses of 

 the genera and species have been drawn up, in order to enable 

 students to identify specimens either from the external characters 



* These numbers amount to a total in excess of that of the known species 

 and varieties, owing to the fact that many forms have two or more " co-types," 

 and that, when these are preserved in different Museums, eacli of the latter is 

 credited with the possession of one type. 



