No. 2391. DESCRIPTIONS OF PLEISTOCENE VERTEBRATA— HAY. 641 



Plate 120. 



Figs. 1-1. Thomomys scudderi. Skull. Type: 



1. Skull seen from left side. X 1. 



2. Bight ramus of lower jaw seen from right side. X 1. 



3. Skull showing palate. X 2. 



4. Lower jaw seen from above. X 2. 

 Figs. 5-6. Citellus tuitus. Skull. Type. X 2: 



5. Palate, showing teeth. 



6. Left side of skull. 



Fig. 7. Citellus taylori. Type. X 1. Left ramus of lower jaw seen from left side. 

 Fig. 8. Procamelus longurio. Type. X 1. Section of the right hinder cannon bone. 

 Fig. 9. Procamelus major Leidy. Section of the right hinder cannon bone. 



Plate 121. 

 All the figures are of approximately the natural size. 



Figs. 1-5. Lepus benjamini: 



1. Lower jaw. Type. Inner face of left ramus, 



2. Referred maxilla. 



3. Eight femur, front view. 



4. Bight tibia, front view. 

 5a. Left humerus, front view. 

 56. Bight innominate bone. 



Figs. 6-18. Brachylagus browni: 



6. Palate, with teeth. Type. 



7. Pveferred skull, showing right side. The bone encrusted with cal- 



cite. 



8. Same skull, seen from above. 



9. Same skull, seen from below. 



10. Palate of another skull, showing tooth sockets. 



11. A right mandible with most of the teeth. 



12. A left maxilla showing zygomatic arch. 



13. A right ramus of the lower jaw. 



14. A right humerus seen from radial side. 



15. Right innominate bone. 



16. Right femur seen from in front. 



17. Bight tibia, lacking the epiphyses. 



18. Upper half of left tibia. 



Plate 122. 



Figs. 1-3. Camelops huerfanensis? A cervical vertebrae. X- .5±: 



1. Seen from below. 



2. Seen from the right side. 



3. Seen from in front — 



(aa) Span of the front and lower parts of the transverse processes. 

 (bb) Span of the lower plate of the transverse processes. 

 Figs. 4-6. Procamelus coconinensis. Tooth and first phalange: 



4. An upper left second(?) molar. Type. X 1. 



5. Same tooth, presenting outer face. X 1. 



6. Anterior first phalange. X .7. 



Fig. 7. Cynomys niobrarius. Palate presenting the teeth. Type. X 1. 



27177— 21— Proc.N.M.vol.59 41 



