198 .AJ 1-. 0. Thomas on 



as in D. dorsalis, but this may possibly be an individual 

 aberration. 



Dimensions of the type, measured on a spirit-specimeu : — 



Head and body 130 mm. ; tail 132; hind foot 30 ; ear 21. 



Skull, greatest length 33*8 ; condylo-incisive length 29"5; 

 zygomatic breadth 16"3; interorbital breadth 5 ; palatilar 

 length 13*3 ; palatal foramina G'8 ; upper molar series 5*0. 



Hah. N.E. Sao Paulo and neighbouring parts of Rio 

 Janeiro. Type from Itatiaya, Rio Janeiro, 4800 ft. ; other 

 specimens from Piquete, Sao Paulo, 2500 ft. [A. Robert), 

 and Alto da Serra, Sao Paulo [Sao Paulo Museum). 



Type. Adult male. B.^^I. No. 14.2.23.12. Collected 

 22 August 1913 and presented by Prof. J. P. Hill, F.R.S. 

 Six specimens examined. 



Our series of D. dorsalis consists of four spirit-specimens 

 from Rio Grande do Sul, the type-locality of the species, 

 collected by Dr. H. von Iheriug, and a nice set of skins 

 from Roga Nova, Parana, obtained by Alphonse Robert in 

 1903. 



XX. — Tioo new Rats of the Rattus confucianus Group. 

 By Oldfield Thomas. 



(Published by permission of the Trustees of the British Museum.) 



My attention having been drawn to some rats referred to 

 Rattus confucianus from Formosa presented by Mr. Good- 

 fellow, I have made an examination of them and fiud that 

 not only do they represent a new species allied to the large 

 Sze-chwan R. excelsior, but that the specimens of " R. con- 

 fucianus" from the Imperial Tombs, E. of Pekin, collected 

 by Mr. Malcolm Anderson, also need description. 



Rattus culturatus, sp. n. 



Size of R. excelsior; skull with supraorbital beading. 



General appearance about as in R. excelsior, that is, very 

 like R. confucianus but larger. Fur long and shaggy. 



Colour varying from mouse-grey to hair-brown, more 

 " saturate ^Mocking than in R. confucianus and excelsior, 

 the latter especially being a much browner animal. Under 

 surface as usual sharply contrasted creamy white, the white 



