2G8 Mr. E. C. ^Yrougllton on 



accep1;ing the Namaqualand series as quoted above as topo- 

 types of true Brantsi. 



From this series I deduce the following as normal dimen- 

 sions of this s])ccies : — 



Head and hody 150 mm.; tail 100; hind foot 28 ; ear 17. 



Skull: greatest length 38; basilar length 31 ; zygomatic 

 breadth 20; lengtli of upper molar scries 8; bullae 11. 



Smith describes the colour as " . . . . sienna-yellow varie- 

 gated with black or umber-brown" — a fairly exact description, 

 only that the sienna-yellow fades to white except in the 

 central dorsal area, i. e. in a band, from the nose to the base 

 of the tail, about as wide as the ears are apart. The indi- 

 vidual hairs are all slate-coloured basally, the majority being 

 broadly tipped paler ; this pale tip is white except in the 

 central dorsal line, where it is tinged with brown ; the 

 minority are black-tipped. The belly, as stated by Smith, is 

 pale grey. 



All the individuals from Klipfontein, without exception, 

 show the modification in the " spiral " pattern of the two 

 anterior laminaj of m-^, as also does 7G4 b, the second of 

 Smith's specimens. On the other hand. Smith's specimen 

 158 ft (skull 764 c), selected by Mr. Thomas (/. c. supra) as 

 the type, shows a modified form in which the inner end of 

 the anterior lamina is produced into the "spiral^' form, but 

 the inner end of the penultimate lamina is also slightly 

 produced and doubled inwards as in the " kidney " pattern. 

 One specimen only (98. 9. 6. I, received from the Cape Town 

 Museum, and labelled ''Namaqualand"") shows a distinct 

 " kidney " pattern. 



Both Brantsi and its subspecies hiteohis, forming group 1 

 of this Section, are easily distinguishable from group 2 by 

 the huge bullae and m^ composed of the equivalents of only 

 four laminae. 



(2) Otomys Brantsi luteolus. 

 Otomys Brantsi luteolus, Thos. & Scliw. P. Z. S. 1904, i. p. 178. 



1. 7. 9. 28-29. Deelfontein, C.C. 



2. 9. 1. 35-47. Deelfontein, C.C. {Col. Sloqgett). 



3.1.4.42. Deelfontein, C.C. {Col. Sloggelt). 



This form difters from true Brantsi in its darker, more 

 brownish fulvous colouring (the whole uppcrsidc being tinged 

 with brown, and not only a dorsal band as in Brantsi, and 

 the brown is much darker than in that species), shorter hiud 

 foot, and shorter upper molar series. 



