PLATE II. 



Fig. 

 1. 



lA. 



2. 



2a. 



3. 



3a. 



3b. 



3c. 



4. 



4a. 



4c. 



5. 



5a. 



6. 



7. 



8. 



9. 



9a. 



9c. 

 10. 

 10a. 

 10c. 

 11. 

 11 A. 

 12. 

 13. 

 14. 

 14a. 

 14b. 

 15. 

 16. 

 16a. 

 17. 

 I 7a. 

 18. 

 18a. 

 19. 



Amhlotherium soricinum. 

 „ mustdulu. 



Peralestes longirostris. 



Outer .side view of tliird 

 Peralestes longirostris. 



Inner side view of third 

 Achyrodon nanus. 



„ pusillns. 

 Peraspalax talf aides. 



Didelphys ojjossum. 

 Peramus teiiuirosfris. 



Perainus temiirostris. 



,, minor. 

 Stylodon pusillus. 



Right mandibular ramus ; nat. size. 

 lb. ; magn. 3 diam. : B, third molar, magn. 6 diam. 

 Right mandibular ramus ; nat. size. 

 lb. ; magn. 3 diam. 

 Right maxilla ; nat size, 

 lb. ; magn. 3 diam. 



lb. ; working surface of molars ; magn. 3 diam. 

 upper molar of Sarcophilus ursinus ; nat. size. 



Left mandibular ramus ; nat. size. 



lb. ; magn. 3 diam. : b, third molar magn. C diam. 

 lower molar of Sarcophilus ursinus ; nat. size. 



Part of right mandibular ramus ; nat. size. 



lb. ; magn. 3 diam. 



Left mandibular ramus ; nat. size : a, ib. ; magn. 3 diam. 



lb. ; nat. size : a, ib., magn. 3 diam. : b, sixth molar; magn. 6 diam. 



Ib. ; a, ib., magn. 3 diam. 



Left mandibular ramus ; nat. size. 



Ib. ; magn. 3 diam. : B, sixth and seventh molars; magn. 4 diam. 



Inner side view of molar ; nat. size. 



Left mandibular ramus ; nat. size. 



Ib. ; magn. 3 diam. : b, under border of ascending ramus ; magn. 3 diam. 



Outer side view of molar; magn. 5 diam. 



Fore part of left mandibular ramus ; nat. size. 



Ib. ; magn. 3 diam. 



Fore part of left mandibular ramus ; nat. size : a, ib. ; magn. 3 diam. 



Left mandibular ramus ; nat. size : a, ib., magn. 3 diam. 



Left maxilla ; nat. size. 



Ib. ; magn. 3 diam. 



Ib. ; working surface of sixth and seventh molars ; magn. 3 diam. 



Ib. ; hind part of left mandibular ramus ; nat. size : a, ib., magn. 3 diam. 



Ib. ; right mandibular ramus, with parts of maxillary molars ; nat. size. 



Ib. ; magn. 3 diam. 



Fore part of left mandibular ramus ; nat. size. 



Ib. ; magn. 3 diam. 



Mandibular rami ; nat. size. 



Ib. ; left ramus ; magn. 3 diam. 



Portion of the left mandibular ramus ; nat. size : a, ib., magn. 3 diam. 



From the fresh-water mammaliferous marl-beds of the Middle Purbeck, Durdlestone Bay, Dorsetshire. 

 The subject of figure 15 is in the Collection of the Rev. Peter Bellenger Bkodie, M.A., F.G.S., 

 Rowington Vicarage, near Warwick ; the subjects of the other figures are in the Collection of Samuel 

 Husbands Beckles, Esq., F.R.S., St. Leonard's-on-Sea. 



