PATAGONIAN EXPEDITIONS: PALEONTOLOGY. 



EXPLANATION OF PLATE X. 



Fig. 



I. 



Fig. 



la. 



Fisr. 



2. 



Proterotherium sp.: P—M-, leftside, crown view. (No. 15,408.) 



" " The same, external view. (No. 15,408.) 



Proterotherium australe : Right upper teeth, crown view. From 



cast of type of P. mixtum. Amegh, 



Coll 



" " Left lower teeth, crown view. From 



cast of type of P. mixtum. Amegh 



Coll 



Proterotherium principale : Anterior lower teeth and mandibular 



symphysis. From cast of type of/*. 



divortium. Amegh. Coll. 



" " P^M-, left side, crown view. From 



cast of type of /". divortium. Amegh 



Coll 



Fig. 6. Proterotherium dodgei : Proximal ends of Mc. Ill and IV, dorsum 



Fig. 3- 



Fig. 4. 



Fig- 5- 



Fig, 



X^. (No. 15,838.) 



Fig, 

 Fig 



7. Proterotherium intermedium : Right lower teeth, crown view 



From cast of type. Amegh. Coll 

 Proterotherium principale : M-, right side, crown view. From 



cast of type of P. dickotomzim. 

 Amegh. Coll. ... 

 Proterotherium intermedium : Left upper teeth, crown view. (A 



M. N. H., No. 9261.) 

 " " Right lower teeth, crown view. (A, 



M. N. H., No. 9261.) 

 Proterotherium principale : Right lower premolars, crown view, 



From cast of type. Amegh. Coll 

 Proterotherium brachygnathus : Mandibular symphysis. From 



cast of type. Amegh. Coll. 

 " " Right lower teeth, crown view. 



From cast of type of Licaph- 

 rium proclivum. Amegh. Coll 

 Proterotherium australe : P-j— M 3^, right side, crown view. From 



cast of type of P. cingtdatum 

 Amegh. Coll. .... 

 Proterotherium cavum : Young mandible, leftside. (No. 15,997.' 

 " " Left lower milk-teeth, crown view. (No 



I5.997-) 



All figures, except fig. 6, are natural size. 



Fig. 8. 



Fig. 9. 



Fig. 



Fig. 



Fig. 



Fig. 



10. 



II. 



12. 



13- 



Fig. 14 



15- 

 15a;. 



80 



63 



63 



65 



65 

 59 

 71 



65 



71 

 72 



65 

 70 



71 

 65 



55 



(vol. VIl) 



