PATAGONIAN EXPEDITIONS I PALEONTOLOGY. 



EXPLANATION OF PLATE LXVI. 



PAGE 



Fig. I. Steiromys duplicatus: Skull, seen obliquely from above, X^. 



Ameghino collection . . . . . . . . 414 



Fig, 2. Steiromys duplicatus: Left ramus mandibuli, side view, X -^. 



No. 15,868 . . . . . . . . . . 419 



Fig. 2a. Steiromys duplicatus : Left ramus mandibuli, crown view, X ^. 

 No. 15,868. 



Fig. 3. Steiromys intermedius ? : Right upper teeth, slightly less than 



natural size. Ameghino collection 418 



Fig. 4. Steiromys intermedius, type: Right ramus mandibuli, X ■^. 



No. 15,367 418 



Fig. 4a. Steiromys intermedius, type : Right lower teeth, crown view, X ^ 

 No. 15,367. 



Fig. 5. Steiromys duplicatus: Left ramus mandibuli, side view, X-^-. 

 Ameghino collection. 



Fig. 6. Steiromys detentus : Palate and upper teeth, X ^. A. M. N. H. 



No. 9,555 414 



Fig. 7. Steiromys DETENTUS : Right ramus mandibuli, X -i-. No. 15,094. 418 



Fig. 7^. '' '' Right lower teeth, crown view, X|. No. 



15,094 . . . . , 418 



Fig. 8. Steiromys duplicatus : Part of left manus, dorsal view, X -i. No. 



15,156 . . . . . . . . . . . 415 



Fig. 9. Steiromys duplicatus: Left pes, dorsal view, X ^. No. 15,156. 

 £n,, Entocuneiform ; S,, first tibial sesamoid ; S/, second tibial 

 sesamoid. .......... 416 



Fig. 10. SciAMYS principalis: Skull, right side, X f . No. 15,623. The 

 alveolus of the upper incisor is too prominent and in this figure 

 and the following one the lachrymal suture has been over- 

 looked . . . . . . . , ^ ^ ^ A2t 



Fig. 10^. SciAMYS principalis: Skull, top, x f. No. 15,623. 



Fig. lod, - - Skull, base, X f. No. 15,623. 



Fig. II. AcAREMYS MURiNus: Skull, top, Xf. A. M. N. H. No. 9,280. 430 



Fig- 11^- '' " Skull, base, X f . A. M. N. H. No. 9,280. 



(vol. v) 



