57 



1. Teeth 28-30 (M , PM f or f , C 1, I f x2) : true molar of upper jaw 

 small, tubercular; of lower, sectorial. Snout very short, decurved. 

 Bulla divided by a septum into posterior and anterior chambers com- 

 municating with each other by a narrow aperture. (Aeluroidea 

 typica.) 



a. Body compact. Feet digitigrade, with the palms and soles hairy. 



Skull with no alisphenoid canal. 



FELIDAE. (IX.) 



b. Body elongated, vi verriform. Feet plantigrade, with the palms and 

 soles bald. Skull with a distinct alisphenoid canal. 



CRYPTOPROCTIDAE. (X.) 



2. Teeth 32-34, diversiform, but no tubercular (or second true) molar 

 in lower jaw. Snout moderate, depressed. Bulla with no septum. 

 Feet digitigrade. (Aeluroidea hyceniformia.) 



a. Teeth 32 (M -- ? ? M T ? C T I |X2); molars very small and 

 distant; no functionalized sectorial molars. 



PROTELIDAE. (XI.) 



b. Teeth 34 (M , PM f, C |, I f x2) ; molars large and approximated ; 

 true molar of upper jaw reduced, tubercular; last pre-molar sec- 

 torial, feline: true molar of lower jaw sectorial. 



HY.SNIDAE. (XII.) 



3. Teeth 36-40 (M f rarely f PM f exceptionally f-C i, I |X2) ; 

 true molars of the upper, and last of the lower jaw tubercular. Snout 

 moderate or elongated, depressed. Auditory bulla divided. ( Aeluro- 

 idea viverriformia.') 



a. Skull irregularly flattened behind above foramen magnum ; with 

 the snout moderate or robust. Incisors approximated; canines 



robust. 



VIVERRIDAE. (XIII.) 



b. Skull convex behind above foramen magnum (at least, especially 

 so in young) ; with the snout slender. Incisors not approximated ; 



canines small. 



EUPLERIDAE. (XIV.) 



B. Skull with the carotid canal well developed, but opening into the 

 foramen lacerum posticum ; condyloid fora-men distinct ; glenoid foramen 

 patent. Os penis large. Cowper's glands not developed. (Cynoidea.') 



1. Teeth typically 42; varying between 38 and 45 (the true molars 



b*iug the varying element. M f Q-f), PM |, C i, I |X2). 



CANILAE, (XV.) 



II. Skull with the paroccipital process not closely applied to the auditory 

 bulla; the niastoid process prominent and projecting outwards or down- 

 wards behind the external auditory meatus; external auditory meatus 

 diversiform. Intestinal canal with no coscuin. Prostate gland not salient, 

 being contained in the thickened walls of the urethra. Skull with the 



