PATAGONIAN EXPEDITIONS! PALEONTOLOGY. 



Fig. 22a. Spaniomys riparius : Left upper teeth, X f . A. M. N. H. No. 9,529 

 Fig. 23. 

 Fig. 24. 

 Fig. 25. 



Fig. 26. 

 Fig. 27. 



Left lower teeth, X f. No. 15,577 

 Spaniomys biplicatus, type : Right lower teeth, X f . Amegh. coll 

 Gyrignophus complicatus, type : Right lower teeth, X f . Amegh 

 coll. ......... 



Graphimys provectus, type : Left lower teeth, X f . Amegh. coll 

 LoMOMYS INSULATUS .' Right Upper teeth, X f . Amegh. coll. 



410 

 411 

 412 



409 

 413 

 403 



(vol. v) 



