119 
Mus decumanus Pallas. 
Java: Buitenzorg; skins: adult and young specimens (228 — 239, 
605), very young specimens (240, twenty three individuals). 
Java: Tjibodas near Sindanglaja; skins: cf ad. (276), one young and 
two very young specimens (277). 
Sumatra: Singkarah; skin : cf ad. (162). 
South Celebes: Tempe; skins : cf? 9 ad. (341, 342). 
Central Celebes : Luwu ; skins: cf ad. and cf nearly ad. (587 a,b). 
Flores: Kotting; skins : 9 ad. (515), young cf (514). 
„ Sikka; skin : cf ad. (77). 
It seems that Mus decumanus attains an enormous size in Celebes, 
the Paradise of large üfws-species. Hoffmann described (Abhandlun- 
gen, Museum, Dresden, 1887, N°. 3, p. 19) large decumanus- speci- 
mens under the name of Mus decumanus , var. major; measuring: 
head and body 23—24 cm., tail 21—22 cm. Perhaps belong to this 
variety the adult male and female from Tempe, South-Celebes, men- 
tioned above. Some measurements may give an impression of the 
dimensions of the adult male-specimen: 
Head and body 
Tail . . . . 
Hind foot . . 
Ear .... 
Nose to ear . 
» » e y 0 * 
Mm. 
230 
„ 202 
n 48 
„ 22 X 16 
» 50 
24 
Like in the following species the number of mammae seems to be 
very variable in Mus decumanus. 
Mus alexandrinus Geoffroy. 
Sumatra: Pajakombo; skin: 9 ad. (204). 
As according Oldfield Thomas (P. Z. S. L. 1881, p. 534) the number 
of mammae in Mus alexandrinus is very variable, viz: from 10 to 
12, I bring the adult female-specimen from Pajakombo under this 
head, being a specimen with 10 mammae. 
Mus rattus Linne. 
Java: Buitenzorg; skins: three very young specimens (603 a, b, c). 
Sumatra: Singkarah; skins: young males (127, 140). 
Celebes: Makassar; skin: very young 9 (553), 
