1889.] NATURAL SCIENCES OF PHILADELPHIA. 239 



9. The post-orbital processes are generally very small, and never 



enclose the orbit behind. 



10. The paroccipital processes project backwards, and do not touch 



the bulla?. 



11. The mastoid is very prominent. 



12. The palate is not at all prolonged behind the molars. 



13. The pterygoid fossa is small. 



14. The coronoid process of the mandible is high and inclined back- 



wards. 



15. There is a short pollex (in Hoplophoneus at least.) 



16. The hallux is well developed. 



17. The ungual phalanges are retractile, and in Hop/ophoneus are 



strongly arched and have wide bony lamina? at their bases. 



18. The humerus has an epicondylar foramen. 

 19 and 20. Unknown. 



21. Li and j~, often developed. 



22. There is often an ^; but no ^i. 



23. ^1 is transversely extended. 



24. The antero-external cusp of L_ 4 is rudimentary or absent. 



2-"). The talon of ^l is much better developed than in the Felidce. 



26. The limbs are relatively short and the feet weak. 



27. The postero-internal cusp of ~ } is often present. 



28. The lower incisors form a straight row ; the second in a line 



with the others. 



29. The front of the jaw is not tapered, and the chin abruptly 



truncate. 

 31. Unknown. 



The Ximraridce differ from both Viverridce and Felidce in the fol- 

 lowing respects : — 



(1.) The paroccipital process is not applied to the bulla. 

 (2.) The mastoid process is quite prominent. 

 (3.) The carotid canal is conspicuous. 

 4. The condylar foramen is not enclosed in the foramen lacerum 



posterius (as is also the case in Viverra antiqua and some of 



the lynxes). 

 •"). Glenoid foramen large. 



6. There is usually a large third trochanter on the femur. 



7. The astragalus in some genera much flattened, and articulates 



with the cuboid. 



