PATAGONIAN EXPEDITIONS! PALAEONTOLOGY. 



EXPLANATION OF PLATE XVI. 



Fig. i. PEI.TEPHILUS FEROX: Skull, right side. Ameghino collection. (The 



suture between the zygyomatic process and 

 the squamosal has been inadvertently omitted 

 in this figure.) ...... 



Fig. 2. PELTEPHILUS FEROX: Skull, top. Ameghino collection 

 Fig. 3. PELTEPHILUS PUMILUS : Skull, right side (No. 15,391) 

 Fig. 4. " " " base (No. 15,391). 



Fig. 5. " top (No. 15,391). 



Fig. 6. PELTEPHILUS GRANDIS : Median posterior plate of head-shield. Ame- 

 ghino collection ...... 



Fig. 7. PELTEPHILUS STREPENS : Part of head-shield (No. 15,390) 

 Fig. 8. " " Scutes of carapace (No. 15,390) 



Fig. 9. " " Right ulna, lacking proximal epiphysis (No. 



15.390). 



Fig. 10. " " Right radius, front (No. 15,390) 



Fig. ii. " " Right manus, lacking digit V (No. 15,390) 



Fig. 12. " " Right femur, front (No. 15,390) 



Fig. 13. " Right tibia and fibula, front (No. 15,390) . 



Fig. 14. " " Left pes, dorsum (No. 15,390) . 



All figures natural size. 



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