57 
1. Teeth 28-30 (M 1, PM 3 or 2?,C 1,1 3x2): 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. (I%.) 
b. Body elongated, viverriform. Feet plantigrade, with the palms and 
soles bald. Skull with a distinct alisphenoid canal. 
CRYPTOPROCTIDAE. (%.) 
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 hyeniformia. ) 
a. Teeth 32 (M —? PM ? C1, I 2x2); molars very small and 
distant; no functionalized sectorial molars. 
PROTELIDAE. (XI.) 
\b. Teeth 34 (M7, PM ¢, C 1,122); molars large and approximated ; 
true molar of upper jaw reduced, tubercular; last pre-molar sec- 
torial, feline: true molar of lower jaw sectorial. 
HYZENIDAE. (XI) 
3. Teeth 36-40 (M 2—rarely 1—PM 4—exceptionally $—C }, I 8x2)5 
true molars of the upper, and last of the lower jaw tubercular. Snout 
moderate or elongated, depressed. Auditory bulla divided. ( Aeluro- 
idea viverriformida. ) 
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 opeuing into the 
foramen lacerum posticum ; condyloid foramen distinct ; clenoid foramen 
patent. Os penis large. Cowper’s glands not developed. (Cynoidea.) 
1. Teeth typically 42; varying between 38 and 46 (the true molars 
being the varying element.—M 2 (}-}), PM 3,0 7,1 8x2). 
CANIPAG (XV.)° 
II. Skull with the paroccipital process not closely applied to the auditory 
bulla; the mastoid process prominent and projecting outwards or down- 
wards behind the external auditory meatus; external auditory meatus 
diversiform. Intestinal canal with no cecum. Prostate gland not salient. 
being contained in the thickened walls of the urethra.—Skull with the 
