PATAGONIAN EXPEDITIONS: PALAEONTOLOGY. 



PAGE 



Fig. 19. PROLAGOSTOMUS IMPERIALIS : Right lower teeth, crown view, X -J-. 



A. M. N. H. No. 9,587 456 



Fig. 20. PLIOLAGOSTOMUS NOTATUS : Left mandibular ramus, crown view, 



X ^. Ameghino collection ....... 458 



Fig. 21. SPHODROMYS SCALARIS: Left lower promolar, X f. Ameghino 



collection .......... 460 



Fig. 22. SCOTVEUMYS IMMINUTUS : Left upper molars, crown view, X f. 



Ameghino collection ........ 459 



Fig. 23. EOCARDIA PERFORATA : Skull, left side, X ^. No. 15,010 . . 477 



Fig. 2T,a. " " Skull, base, X ^. No. 15,010. 



Fig. 23*5. " " Right upper teeth, X f. No. 15,010. 



Fig. 23^. " " Right lower teeth, X f . No. 15,010. 



Fig. 24. EOCARDIA DIVISA : Left lower milk-premolar and first molar, X f . 



Ameghino collection . . . . . . . . 479 



Fig. 25. EOCARDIA EXCAVATA: Right lower teeth, crown view, X f. Ame- 

 ghino collection. ( Type of Tricardia gracilis.} . . . 474 



Fig. 26. SCHISTOMYS ERRO, juv. : Right upper teeth; crown view, X f. No. 



15.383 .... 486 



Fig. 260. SCHISTOMYS ERRO, juv. : Right lower teeth, crown view, X f. 

 No. 15,383. 



Fig. 27. EOCARDIA sp., juv. : Left upper teeth, crown view, X f. Ame- 

 ghino collection. (Referred to Hedimys integrus.} . . 462 

 N. B. In Figs. 15, 17, 19 and 20 the transverse plates of enamel are made too 



thick ; they should have been indicated by a single line, as in Fig. 18. 



(VOL. v) 



