PATAGONIAN EXPEDITIONS: PALAEONTOLOGY. 



EXPLANATION OF PLATE LXVI. 



PAGE 



Fig. i . STEIROMYS DUPLICATUS : Skull, seen obliquely from above, X y. 



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. 40. STEIROMYS INTERMEDIUS, type : Right lower teeth, crown view, X y. 



No. 15,367. 

 Fig. 5. STEIROMYS DUPLICATUS : Left ramus mandibuli, side view, X T . 



Ameghino collection. 

 Fig. 6. STEIROMYS DETENTUS : Palate and upper teeth, X T . A. M. N. H. 



No. 9,555 414 



Fig. 7. STEIROMYS DETENTUS : Right ramus mandibuli, X T .- No. 15,094. 418 

 Fig. 7. " " Right lower teeth, crown view, X T . No. 



15,094 . 418 



Fig. 8. STEIROMYS DUPLICATUS : Part of left manus, dorsal view, X T . No. 



I5.J56 ... 415 



Fig. 9. STEIROMYS DUPLICATUS: Left pes, dorsal view, X . No. 15,156. 

 En., 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 . .......... 425 



Fig. loa. SCIAMYS PRINCIPALIS: Skull, top, x f No. 15,623. 



Fig. \ob. " " Skull, base, X f. No. 15,623. 



Fig. ii. ACAREMYS MURINUS: Skull, top, Xf. A. M. N. H. No. 9,280. 430 



Fig. na. " Skull, base, X f . A. M. N. H. No. 9,280. 



(VOL. v) 



