376 MR. C. BODEN KLOSS ON 
32. Rattus rajah surifer. 
Mus surifer, Miller, Proc. Biol. Soc. Washington XTIT, p. 148, pl. 
IV, figs 4, 4a, 4b (1900). 
Epimys surifer, Woughton, Journ. Bombay Nat. Hist. Soc. XXTTT, 
p. 714 (1915). 
Epimys surifer surifer, Kloss, Journ. Nat. Hist. Soc. Siam, TT, p. 26 
(1915) 
1 ad. Koh Lak. 
This example (with others from Maprit in Patiyu, and 
specimens I have seen from Bangkachon, 8, Tenasserim ) is searcely 
typical, being a trifle less brilliantly coloured than the race from 
Peninsular Siam (thus showing a slight approach to R. s. finis 
and R. s. siarma.), but is best ranked with the original continental 
form. 
(For measurements see table postec ). 
33. Rattus rajah finis. 
Epimys surifer finis, Kloss, P. Z. 8., 1916, p 51; id. Journ. Nat. 
Hist. Soc. Siam, IT, p. 85 (1916). 
33 ad., 52 ad., 1d imm. Satahip, S. E. Siam. 
A series of fine adult .animals, the majority showing well- 
worn teeth; No. 2387 being the largest specimen of R. rajah I have 
seen. The skulls are apparently rather broader that in R. r. swrifer 
of Peninsular Siam, and the tooth-rows are parallel, or even diverge 
a trifle posteriorly, instead of converging. 
( For measurements see table postec ). 
34. Rattus rajah koratis, subsp. nov. 
Specimens examined. 63 ad., 82 ad., Lat Bua Kao. 
Diagnosis. ‘Darker and duller than R. 7%. finis, more heavily 
blackened above and the yellow element less brightly ochraceous ; 
white of underparts extending up the sides of the muzzle and to the 
hindfeet, the wrists and forearms often white above. 
Skull not essentially differing from R. rv, finis; the upper 
tooth-rows parallel. 
Type. Adult male (skin and skull) No. 2187/CBK. Colleeted 
at Lat Bua Kao, E. Siam on 18th October 1916. 
Measwrements. See table postea. 
JOURN, NAT, HIST, SOO, SIAM. 
