PATAGONIAN EXPEDITIONS : PALAEONTOLOGY. 



EXPLANATION OF PLATE LXVII. 



PACK 



Fig. i. SCIAMYS LATIDENS, type : Skull, top, X f No. 15,944. 421 



Fig. la. " " " Skull, base, X A. No. 15,944, 



Fig. \b. " " " Skull, left side, X f No. 15,944. 



Fig. ic. " " " Left upper teeth, X f. No. 15,944 . 428 



Fig. id. " " " Left lower teeth, Xf. No. 15,944 . 428 



Fig. \e. " " " Skull, left side, Xf No. 15,944. The 



ventral border of the mandible has an unduly strong curvature, 

 due to the even fracture and loss of the incisor sheath. 



Fig. if. SCIAMYS LATIDENS, type: Skull, base, Xf. No. 15,944 . . 421 

 Fig. ig. " " " Skull, top, Xf No. 15,944. 



Fig. 2. " " " Right tibia and fibula, X f No. 15,944 424 



Fig. 3. " " " Right pes, dorsum, X f No. 15,944 . 4 2 4 



Fig. 4. ACAREMYS MURINUS: Skull, top, Xf A. M. N. H. No. 9,280 . 430 

 Fig. 4. " " Skull, base, Xf A. M. N. H. No. 9,280. 



Fig. 46. " " Skull, side, X f A. M. N. H. No. 9,280. 



Fig. 5. SCIAMYS VARIANS : Skull, top, X f No. 15,575 .... 426 



Fig. 5. " " Skull, base, X A. No. 15,575. 



Fig. $l>. " " Skull, side, Xf No. 15,575!. 



Fig. 6. SCIAMYS ROSTRATUS, type : Skull, top, Xf No. 15,287 . . 427 

 Fig. 6a. " " " Skull, base, Xf No. 15,287. 



Fig. 6b. " " " Skull, side, X f No. 15,287. 



Fig. 7. SCIAMYS PRINCIPALIS: Skull, top, Xf No. 15,623 . . . 425 

 Fig. 70. " " Skull, base, X f No. 15,623. 



Fig. 7<$. " " Skull, side, Xf No. 15,623. 



Fig. TC. " " Right upper teeth, X f No. 15,623 . . 425 



Fig. yd. " " Right lower teeth, X f No. 15,623. 



Fig. 8. SCIAMYS sp. : Left lower teeth, crown view, X f. No. 15,283 . 421 

 Fig. 9. SCIAMYS VARIANS : Auditory region of skull, left side, X f No. 

 15,168. S.s.m., supramastoid process of squamosal ; Ty., tym- 

 panic ; Per., periotic; P.oc., paroccipital process ; P.M., foramen 

 magnum ........... 42 1 



Fig. 10. ACAREMYS MINUTUS : Skull, top, X f No. 15,806 . . . 432 



Fig. 100. " " Skull, base, Xf No. 15,806. 



Fig. io<5. " " Skull, side, X f No. 15,806. 



Fig. io<r. " Right upper teeth, X f No. 15,806 . . 432 



Fig. ii. ? ACAREMYS MINUTISSIMUS : Fragment of right upper jaw, with p A 



and m 1 , Xf No. 15,086 433 



