704 



PROF. H. O. SEELEY ON THE REPTILE 



EXPLANATION OF PLATES XXVIL-XXXL 

 (All the figures are of the natural size, unless an enlargement is mentioned.) 

 Plate XXVII. 



Fig. 1. Dentary bone of right ramus of lower jaw of Mochlodon Suessii (Biinzel) 

 seen from above, showing tooth-sockets, symphysial curvature, and 

 ascending coronoid process. 



2. Separate tooth of Mochlodon Suessii from the lower jaw, showing the 



internal aspect ; enlarged twice. 



3. Tooth referred to the upper jaw of Mochlodon Suessii, showing the 



ribbed external face of the crown; enlarged twice. 



4. Side view of the same tooth, showing the worn internal edge of the 



crown and curved fang. 



5. Left side of hinder portion of skull of Struthiosaurus austriacus (drawn 



reversed for comparison with fig. 7), showing downward direction of 

 occipital condyle, foramina at base of skull, plate in front of the sella 

 turcica, transverse groove on roof of skull, &c. 



6. The same skull seen from the front, showing the parietofrontal suture, 



form of the parietal bone, cerebral cavity, form of the basisphenoid 

 and sella turcica, &c. 



7. Right side of hinder part of "base of skull of Acanthopkolis horridus, 



Huxley, showing the united basioccipital and basisphenoid bones, 

 with the line of large nerve-foramina. (Original in Museum of 

 Practical Geology.) 



8. Anterior aspect of same specimen, showing posterior plate of sella turcica. 



9. Dentary bone of right ramus of lower jaw referred to Cratcsomus. The 



specimen is seen from above, and shows tooth-sockets along the alve- 

 olar margin. 



10. External aspect of same specimen, showing the large foramina below the 



alveolar margin and above the longitudinal angle. 



11. Tooth referred to Crataomus, probably from the lower jaw, showiug 



cinguloid ridge at the base of the crown ; enlarged twice. 



12. Similar tooth, less worn, showing serrations on the right margin; en- 



larged twice. 



13. Tooth referred to the upper jaw of Cratcsomus, showing bevelled edges, 



probably due to wear ; enlarged twice. 



14. External aspect of same specimen ; enlarged twice. 



15. Tooth probably of the larger species of Cratcsomus. 



16. Anterior aspect of same tooth, showing cinguloid thickening on both 



sides of the crown ; enlarged twice. 



17. Dorsal rib from the right side, referred to Cratcsomus lepidophorus, 



showing articular surfaces. 



18. Transverse section from the proximal third of the same rib, showing 



transverse expansion of the superior plate and lateral compression of 

 the body of the rib. 



19. Middle of shaft of left tibia referred to Cratcsomics lepidophorus, showing 



muscular ridges on the fibular aspect and commencement of proximal 

 expansion. 



20. Proximal portion of right fibula of Cratceomus, showing convex tibial 



aspect. 



21. Tooth referred to MegaUsaurus pannoniensis ; one and a half times 



natural size. [The serrations are not directed upward so much as in 

 the figure.] 



22. Anterior aspect of the same tooth, showing limit of the serrations. 



23. Transverse section of base of same tooth, showing posterior compression. 



24. Tooth of a Crocodile, with slight lateral ridges and worn crown ; en- 



larged twice. 



25. A smaller more compressed and curved Crocodilian tooth, showing one 



of the lateral ridges ; enlarged twice. 



26. Claw phalange, probably of Bhadinosaurus. 



27. Internal surface of first left costal plate of Emys Neumayri. 



