28 



Annals of the Carnegie Museum. 



Less mature. (Cotype, No. 32.) 



Lateral 



Plate H. 

 Fig. I. Stenocephalemys albocatidala Frlck. 

 Lateral view of skull and mandible, t- 

 Fig. 2. Do. Superior view of skull. 



Do. Inferior view of mandible. 

 Do. Inferior view of skull. 

 Do. Superior view of mandible. 



Epimys tidbergi endorobce. (U. S. Nat. Mus., No. 163402, 9 •) Lateral 

 view of skull and mandible. \. 



Fig. 7. Do. Superior view of skull. 



Do. Inferior view of mandible. 

 Do. Inferior view of skull. 

 Do. Superior view of mandible. 



Plate III. 

 Otomys jacksoni helleri Frick. (Field No. E. A. M. 7531.) 

 view of skull and mandible. \. 



Fig. 2. Do. Superior view of skull. 



Do. Inferior view of mandible. 

 Do. Inferior view of skull. 

 Do. Superior view of mandible. 

 Otomys jacksoni malkensis Frick. 

 Lateral view of skull and mandible. \. 

 Fig. 7. Do. Superior view of skull. 



Do. Inferior view of mandible. 

 Do. Inferior view of skull. 

 Do. Superior view of mandible. 



Plate IV. 



Fig. I. Arvicanthis abyssinicus blicki Frick. 

 cT.) Lateral view of skull and mandible, y. 



Fig. 2. 



Fig. 3. 



Fig. 4. 



Fig. 5. 



Fig. 6. 

 7522, &.) 



Fig. 7. 

 Fig. 8. 

 Fig. 9. 

 Fig. 10 



Fig. 3. 

 Fig. 4. 

 Fig. 5. 

 Fig. 6. 



Fig. 8. 

 Fig. 9. 

 Fig. 10. 



Fig. I. 



Fig. 3. 

 Fig. 4. 

 Fig. 5- 

 Fig. 6. 



Fig. 8. 

 Fig. 9. 

 Fig. 10. 



(Type, Field No. D. G. R. 29.) 



(Type, Field No. D. G. R. 26. 



Fig. I. 



Do. Superior view of skull. 

 Do. Inferior view of mandible. 

 Do. Inferior view of skull. 

 Do. Superior view of mandible. 

 Arvicanthis abyssinicus mearnsi Frick. 

 Lateral view of skull and mandible. \ 

 Do. Superior view of skull. 

 Do. Inferior view of mandible. 

 Do. Inferior view of skull. 

 Do. Superior view of mandible. 



Plate V. 



Arvicanthis abyssinicus raffertyi Frick. 



(Type, Field No. E. A. M. 



(Type, Field No. D. G. R. 59. 



cf.) Lateral view of skull and mandible. 

 Fig. 2. Do. Superior view of skull. 

 Fig. 3. Inferior view of mandible. 

 Fig. 4. Inferior view of skull. 

 Fig. 5. Superior view of mandible. 



