392 On the " Ground- IIo</s " or "Cane-Rats " of Africa. 



licavy, with <iieatlj developed occipital crests. Posterior 

 part of frontal region with deeply notched lateral inter- 

 temporal gutters, whose edtres are sharply defined in old age. 

 Jlab. Central and Southern Africa, from the 13ahr-cl- 

 Gliazal and Uganda to Eastern Cape Colony. 



Thryonomys swinderianus raptorutn, subsp. n. 



Size medium. Colour comparatively dark, strongly varie- 

 gated, but the rump little more butiy than the rest of the 

 back. Skull rather narrow, and the lateral intertem|)ural 

 gutters scarcely developed. 



External measurements of type : — 



Head and body 576 mm. ; tail 200 ; hind foot 88 ; 

 ear 34. 



Uab. Forest region of Lower Nigeria and the Gold Coast, 

 extending eastwards through the Congo area. Type from 

 Lagos. 



Type. Adult male. B.M. no. 20. 3. 18. 39. Original 

 numijer 4. Collected 19th December, 1919, and presentcil 

 by WiUoughby P. Lowe. 



Thryonomys swinderianus anyolw, subsp. n. 



Smaller. Colour rather more buffy than in raj>(orum. 



Skull short and squat. Supraorbital edges nearly parallel, 

 the posterior gutters hardly developed. 



External dimensions of type : — 



Head and body 500 ram. ; tail 195 ; hind foot 80. 



Uab. Angola. Type from the junction of the Luando and 

 Cuje iiivers. Alt. 4500'. Another from Ndallo Tando, 

 N. Angola, 2500' (Ansorge). 



Type. Adult male. B.M. no. 20. 4. 27. 2. Original num- 

 ber 1. Collected 30th August, 1919, and presented by 

 Capt. Gilbert Blaine. 



Skull-dimensions (all adult males) : — 



T.8. siiiiuleriaitui). ^ . . 



Bouuett's original raj/toriuii. ani/ohc. 



specimen iioiu •/- ," Type. J yi'e. 

 Sierra Leone. 



nnu. mm. mui. uiui. 



(jreatest length 94 105-5 99 93 



C'ondylo-iucisive length 842 92"3 88'5 S3''3 



Zv^romatic breadth GO 70 62 (51 



luterorbital breadth ;i4-t) 41 38 3-'-2 



Intertemporal breadth on guttefs. 297 305 37-5 317 



Upper cbeek-teeth 19-5 19-2 197 19-0 



