418 Mr. O. Thomas on 



last inch, and forming a slight pencil at the tip, where they 

 are about 2 mm. in length ; colour pale brown, rather lighter 

 proximally below. Mammaj unknown. 



Skull very like that of M. angohnsis. but larger; anterior 

 edge of zygomatic plate slightly concave. 



Dimensions of the type (measured in skin) : — 



Head and body 136 mm. ; tail 176 ; hind foot 28 ; ear 19. 



Skull : greatest length 34 ; basilar length 25*5 ; nasals 15; 

 interorbital breadth 4*6 ; diastema 8*5 ; palatal foramina 7*8 ; 

 length of upper molar series 5' 2. 



Hah. Pungo Andongo. Alt. 1200 m. 



Type. Old male. B.M. no. 4. 4. 9. 67. Original number 

 49. Collected 14th June, 1903. 



This rat looks at first sight like a diminutive relative of 

 Mus Bocagei, but it would seem on the whole more related to 

 M. angohnsis, from which it differs by its reddish rump, 

 white belly, more hairy tail, and longer feet. If this view of 

 its affinities is correct, its mammary formula should prove to 

 be 3—2 = 10. 



36. Mus angolensis, Boc. 



$. 47, 87; ¥ . 114, 117. Pungo Andongo. 



This is the Angolan representative of the widely distributed 

 rat with 3 — 2 = 10 mammae, otherwise so like the multi- 

 mammate form. It appears to have, however, broader poste- 

 rior nares than the latter. 



37. Mus sp. (multimammate). 

 S . 79, 103, 106, 116; ? . 67, 111, 115. Pungo Andongo. 



38. Mus arborarius, Peters. 

 <? . 107, 121 ; ? . 90. Pungo Andongo. 



39. Mus carillus, sp. n. 



<? . 33, 50, 61, 82, 113 ; ? . 26, 65, 85. Pungo Andongo. 



A small buffy mouse, with long tail, similar to M. Alleni. 

 Mammas 1—2 = 6. 



Size small, form delicate, with slender feet and long thin 

 tail. Fur soft and fine, hairs of back about 6-7 mm. in 

 length. General colour above buffy fawn, varying very 

 much in tone and brightness according to age and state of 

 development, some of the younger specimens near " cinna- 

 mon," older ones almost "ochraceous." Under surface greyish 



