PATAGONIAN EXPEDITIONS: PALEONTOLOGY. 



EXPLANATION OF PLATE VIII. 



PAGE 



Fig. I. Proterotherium CAVUM : Skull, ventral side. (No. 9245, A.M. N.H.) 56 



Fig. I a. " " Skull, dorsal side. (No. 9245, A. M. N. H.) 



Fig. 2. " " Left upper teeth, crown view. From 



cast of co-type. Amegh. Coll. . . 74 



Fig. 3. " " Left lower teeth, crown view. From cast 



of co-type. Amegh. Coll. ... 74 



Fig. 4. Proterotherium INTERMEDIUM : Mandible, left side. (No. 15,996.) 74 



Fig. 4a. " " Left lower teeth, crown view. (No. 



15.996.) 

 Fig. 5. Proterotherium pyramidatum : Right upper molars, crown view. 



From cast of type. Amegh. Coll. 68 



Fig. 6. Proterotherium sp. : Second upper molar, right side, crown view. 

 Fig. 7. Proterotherium acre : First upper molar, left side, crown view. 



From cast of type of Heptacojius acer. 



Amegh. Coll 80 



Fig. 8. TiCHODON quadrilobus : Third lower molar, left side, crown view. 



From cast of type. Amegh. Coll. . 83 



All figures natural size. 



(vol. vii) 



