1917'J C. BoDEN K1.0SS : On Burmese and Himalayan Rats. 7 



The colour of the pelage has been discharged and altered by 

 spirit, but the fur of the undersurface was apparently white with 

 a grey base and the hands and feet were white. 



I am unable to say how the skull compares with other Indo- 

 Chinese forms of rattus, but it is quite distinct from those of 

 Central and South-east Siani or of the Malay Peninsula. The 

 upper profile is less curved, the rostrum is lighter but longer and 

 the bullae are much smaller and much less dilated, while the tooth- 

 row, diastema and palate seem longer. As compared with two 

 scarcely adult examples of " r alius" from Calcutta (the only 

 Indian material to hand) the skull though of larger size with 

 broader palatal foramina has again much smaller and more con- 

 stricted bullae. 



Measurements of skull : greatest length, 45-8 ; condylo-basilar 

 length, 40*2; basilar length, 37'5 ; palatilar length, 2r"8; palatal 

 foramina, 8-9 X 3*3; diastema, I2"5; breadth of palate between 

 anterior roots of «r^, 5*9 ; length of upper tooth-row (alveolar), 7*3 ; 

 upper edge of ante-orbital foramen to tip of nasals, 15*9; nasals, 

 i8X3"8; inter-orbital breadth, 6-5 ; zygomatic breadth, 2r-o. 



It is not easy to understand how Blyth subsequently {J .A.S.B., 

 XXXII, 1863, p. 342) considered this animal to be the same as his 

 Mus berdmorei. 



4. Rattus concolor (Blyth). 



Miis coiicoloi', Blyth, Joum. Asiat. Sue. Bengal, XXX'III, p. 295 

 (1859) : id. op. cit., XXXII, pp. 74, 3.1.4 (1863) ; Sclater, P.Z.S., iSgo, 

 p. 526, pi. xliv, figs. 3, (7, b, c (1890) ; id., Cat. }f(i)ini!. Ind. Mus, II. 

 p. 68 (1891). 



The types of this species, three specimens collected b}- Berd- 

 more at Shweg\'in, Tenasserim, and preserved in alcohol, are 

 unsatisfactory. Specimen [e) of Sclater's catalogue is apparently 

 adult though the teeth show no signs of wear, (/) is smaller than {e) 

 and sub-adult with teeth quite unworn, while [g] is a juvenile. 

 As the skull of (<?) is unfortunately badly crushed I .select the 

 female specimen (/) as lectotype; for the skull figured by Sclater 

 [Lc.s.) is evidently not one belonging to a member of the type 

 series, but to some much larger individual. The skull (/) is com- 

 plete and is in good condition except that the right parietal region 

 is crushed inwards. 



No colour details are available owing to long immersion in 

 spirit. 



Measurements of specimen (/):— head and body about roo 

 (108)'; tail, 112 (131); hind foot, 23-3 (25); ear, 136 (15). 



Skull: greatest length, 29*0; condylo-basilar length, 25'0; 

 basilar length, 23*0; palatilar length, I3'2; length of palatal 

 foramina. 5-6; diastema, 7*5 ; length of upper tooth-row (alveolar), 

 4-9; length of nasals, 10*4; inter-orbital breadth, 4*5 ; zygomatic 

 breadth, i4-2. 



Measurements in parentheses are those of the male individual (e). 



