380 MR. C. BOOEN KLOSS ON 



Genotype ; Tautatus thai, sp. nov. 



Tijpe ( and 011I3' specimen examined ). Female, young adult 

 (skin and skull). Collected at Raheng in February 1917, by 

 :\Ir. K. G. Gairdner. Author's number 261G/C.B.K. 



Diaijnosis. Base of upper fur deep neutral grey : pelage of two 

 kinds : — longer hairs (9 mm.) with long dark tips, and shorter hairs 

 (G mm.) with verj'' short dark tips and broad subtermiiial annulations 

 of ochraceous-tawny ; the general colour effect being a grizzle of ochra- 

 ceous-tawny and dark brown, the latter most marked on the back. 



Entire underparts of head, body and limbs, together with the 

 region of the vibrissae and sides of throat and neck, clad with hair 

 having grey bases and white tips, producing an effect of silvery white, 

 clearly margined. Forelimbs grey above : hands and feet clear white. 

 Inner sides of ears sparsely clad with greyish hair, backs with proectote 

 ochraceous-tawny. Vibrissae black and white. Tail blackish above 

 and clad with dark hairs, below pale and clad with whitish hairs : at 

 mid-length 22 rings to the centimetre. 



Cranium globose ; rostrum only very slightly conve.^c ; nasals 

 rather pointed posteriorly and, viewed in profile, slightly concave ; 

 palatal foramina narrowed posteriori}' and reaching a line joining the 

 antero-internal tubercles of i/i' ; bullae not flattened at all. 



Measurements. Head anil body, 01 ; tail, 72 ; hindfoot. s. u.. 

 17.5 ; ear, 12.-5. 



Skull : — greatest length, 20.9 ; condylo-basilar length, 18.5 ; 

 basilar length, 16.9 ; iialatilar length, 9.5 ; length of palatal foramina, 

 '1.5 ; <liastema, 5.2 ; upper molar row (alveoli), 1.0 ; greatest length of 

 nasals, 7.0 ; combined breadth of nasals, 2.1 ; depth of rostrum between 

 extremity of nasals and posterior alveolar edge of incisor, 2.5 ; interor- 

 bital constriction, 3.8 ; greatest crani.d bi'eadtli, 10.0 ; zygomatic breadth 

 (a])proximate), 10.8. 



Ueiiiarlca. \V'hether this animal is the same as Mas nitidulus 

 Blyth,* it is impossible to say at present as the type has disappeared 

 and no other specimens have been obtained : though the colouring was 

 apparently very similar it was a laignr animal with the tail equal in 



•Jonrn. A<iiat. So<>. Bt'iiRal XXVIII. p. 29t. 



JOIIRN. NAT, III.ST. •''Or. .SUM 



