172 BULLETIIT 99, UNITED STATES NATIONAL MUSEUM. 



Plate 8. 



Skull of type-specimen of Sciurus undulatus True, adult male; Cat. No. 19005. 

 Natural size. (=Heliosciurus undulatus undulatus.) 



Plate 9. 



Skull of type-specimen of neliosdurus rufobrachiatu^ shindi Heller. Adult male; 

 Cat. No. 182768. Natural size. {=IIeliosciurus undulatus shindi.) 



Plate 10. 



Skulls of type-specimens (natural size). 



Left. Heliosdurus multicolor madogx Heller. Adult male; Cat. No. 164828. 

 Right. Paraxerus kahari Heller. Adult female; Cat. No. 164203. {=Paraxenis 

 ochraceus kahari.) 



Plate 11. 



Skull of type-specimen of Protoxerus stangeri bea Heller. Adult male; Cat. No. 

 181786. Natural size. 



Plate 12. 



Skulls of type-specimens (natural size) . 



Left. Tatera varia Heller. Adult male; Cat. No. 162249. (= Tatera bohmi varia. ) 

 Right. Tatera pothse Heller. Adult female; Cat. No. 161716. (=Tatera vicina 

 pothse.) 

 (From Smithsonian Misc. Coll., vol. 56, No. 9, pi. 1. 1910.) 



Plate 13. 



Skull of type-specimen of Tatera nigricauda percivali Heller. Adult female; Cat. 



No. 183945. Natural size. 



Plate 14. 



Skull of type-specimen of Lophiomys thomasi Heller. Adult male; Cat. No. 181789. 



Natural size. 



Plate 15. 



Skull of type-specimen of Tachyoryctes rex Heller. Adult male; Cat. No. 163088. 

 Natural size. (From Smithsonian Misc. Coll., vol. 56, No. 9, pi. 3, 1910.) 



Plate 16. 



Skulls of type-specimens (natural size). 



Upper figures. Dendromus mesomelas percivali Heller. Adult female; Cat. No. 

 181791. (= Dendromus insignis percivali.) 

 Middle figures. Dendromus whytei capitis Heller. Adult female; Cat. No. 181792. 

 Lower figures. Dendromus lineatus Heller. Adult male; Cat. No. 164816. 



Plate 17. 



Skulls of type-specimens (natural size). 



Upper figures. Dendromus nigrifrons True. Adult female; Cat. No. 35263. 

 Middle figiures. Dendromus spectabilis Heller. Adult female; Cat. No. 164815. 

 (= Dendromus nigrifrons spectabilis.) 

 Lower figures. Steatomys athi Heller. Adult female; Cat. No. 162883. 



Plate 18. 



Skulls of type-specimens (natural size). 



Left. Zelotomys hildegardese vinaceus Heller. Adult female; Cat. No. 181798. 

 Right. Thamnomys dolichurus littoralis Heller. Adult male; Cat. No. 181799. 

 (=Thamnomys surdaster littoralis.) 



