642 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 59. 



Plate 123. 



Fig. 1. Camelus maximus. An anterior first phalange. Type. X .72. 

 Fig. 2. Procamelus huerfanensis. Front first phalange. X .75. 

 Figs. 3-4. Procamelus longurio. Fir6t phalangeals. X .73. 



3. Anterior first phalange, seen from front. 



4. Hinder first phalange, seen from front. 



Fig. 5. Procamelus coconinensis. Hinder first phalange. X .73. 

 Figs. 6-8. Marmota arizonae. Skull. Type. X 1: 



6. Skull seen from below. 



7. Same skull seen from above. 



8. Same skull seen from the right side. 



Plate 124. 



Fig. 1. Equus occidentalis? Right hindermost molar. Polished section . XL 

 Figs. 2-3. Equus giganteusf X 1. 



2. Right hindermost molar. Grinding face. 



3. Part of a right upper molar. X 1. 



Fig. 4. Procamelus longurio. Right hinder cannon bone. Type. X .5. 



Figs. 5-6. Chasmaporthetes ossifragus Parts of left ramus of lower jaw. Type. XL 



5. Seen from outside. 



6. Seen from above — 



(a) Rear of socket for canine. 



(6) Front root of second premolar. 



(c) Hinder root of second premolar. 



(d) Socket for front root of third premolar. 



(e) Part of socket for hinder root third premolar. 

 (/) Front root of fourth premolar. 



(g) Hinder root of fourth premolar. 

 (h) Front root of first molar, 

 (i) Rear root of first molar. 



