PLATE IV. 



Fig. 



1. Triconodon feroiv . Portions of upper and lower jaws; nat. size: a, upper molar ; 



magn. 4 diam. : b, right, c, left, mandibular ramus ; both 

 magn. 2 diam. 



2. „ occisor. Right and left mandibular rami ; nat. size. 



2a. „ „ Teeth of left ramus; b, teeth of right ramus; both magn. 



2 diam. 



8. „ major. Right mandibular ramus; nat. size: a, section of fractured 



fore part. 



4. ,, sp. ind. Right mandibular ramus ; nat. size. 



5. „ „ Portion of right maxilla; a, under view; b, end view ; nat. size. 

 5 A. „ „ Side view; magn. 3 diam. 



6. ,, minoj- (?). Right mandibular ramus; nat. size : a, ib., three molars ; magn. 



3 diam. 



1 .Triacanthochn serrula. Portion and impression of left mandibular ramus : a, ib. ; magn. 



2 diam. 



S. ,, ,, Counterpart impression and portion of the same ramus; nat. size: 



a, ib. ; magn. two diam. 



9. Plagiaulax minor. Dentigerous part of right mandibular ramus and teeth ; nat. size. 

 9 a. ,, ,, Ib. ; magn. 3 diam. : b, the two molars ; magn. 6 diam. 



10. ,, Becklesii. Portion and impression of right mandibular ramus ; nat. size. 

 10 a. „ „ Ib. ; magn. 3 diam. : b, condyle, magn. 3 diam. : c, condyle of 



Ilypsiprymnus minor, nat, size : D, condyle of Thylacinus ; 

 \\-A nat. size. 



11. „ ,, Counterpart impression and portion of the same ramus ; nat. size. 

 11a. „ „ lb.; magn. 3 diam. 



12. „ „ Fragment of right mandibular ramus ; nat. size. 



12 a. ,, ,, Ib. ; magn. 3 diam. : b, working surface of the two molar teeth, 



magn. 3 diam. 



13. „ ,, Pore part of right mandibular ramus, inner side; nat. size. 



13 a. „ „ lb.; magn. 3 diam. : 5, section of jaw and premolar, jo 4. 



14. ,, „ Ib. ; ib. ; outer side, nat. size. 

 14a. „ „ lb.; ib. ; magn. 3 diam. 



15. „ „ Ib. ; teeth and impression of the fore part of a mandibular 



ramus ; nat. size. 

 15a. ,, „ lb.; magn. 3 diam.: Vdb, section of laniary incisor, magn. 



3 diam. 



1(). „ Falconeri. Right mandibular ramus, nat. size. 



16 a. „ „ Ib. ; magn. 3 diam. : b, section of laniary, magn. 3 diam. 



Prom the fresh-water mauuualiferous marl-beds of the IMiddle Parbeck, Durdlestone 

 Bay, Dorsetshire. In the Collection of Samuel Husbands Beckles, Esq., P.R.S., St. 

 Leonard's-on-Sea. 



