198 Mr. O. Thomas on 
as in D. dorsalis, but this may possibly be an individual 
aberration. 
Dimensions of the type, measured on a spirit-specimen :— 
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 6°8; upper molar series 5:0. 
Hab. N.E. Sio 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, Sio Paulo (Sao Paulo Museum). 
Type. Adult male. B.M. 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 Ihering, and a nice set of skins 
from Roca Nova, Parana, obtained by Alphonse Robert i 
1903. 
XX.—Two new Rats of the Rattus confucianus Group. 
By Ouprietp 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 find 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. 1. 
Size of R. excelsior; skull with supraorbital beading. 
General appearance about as in R. eacelsior, that is, very 
like R. confucianus but larger. Fur long and shaggy. 
Colour varying from mouse-grey to hair-brown, more 
‘saturate ’’-looking than in R. confucianus and excelsior, 
the latter especially being a much browner animal. Under 
surface as usual sharply contrasted creamy white, the white 
