VIVERRINES. 48t 



doxurus), it is situated farther back in the Civets and Genets, in 

 which the blade of the sectorial is sharper. The first upper molar 

 (fig. 1 & 2, ?w 1) has a trihedral crown, with two small external 

 cusps and one low and large internal tubercle : this, in Cynogael 

 (fig. 5, m 1) is more developed. 



In the lower jaw the sectorial tooth (fig. 3, m 1) is the first 

 true molar, as in the Dog, and manifests its proper character by 

 the presence of an additional pointed lobe on the inner side of 

 the two lobes forming the blade at the fore-part of the crown : the 

 posterior, low, and large lobe of the tooth being also tri-tuber- 

 culate, as in the Dog. The last molar (fig. 3, m 2) has an oval 

 crown with four small tubercles, resembling the penultimate lower 

 molar in the Dog, with which it corresponds. 



The deciduous dentition consists, in the Viverrine family of: 



T • 3—3 . 1—1 - 3—3 _. 



Incisors — : canines — : molars — : =28. 



3—3 ' 1—1 ' 3—3 



If the first permanent premolar has any predecessor it must be 

 rudimental and disappear early in both jaws ; the second premolar 

 displaces the first normally developed deciduous molar ; the third 

 upper premolar displaces and succeeds the deciduous sectorial, 

 which has a sharper and more compressed blade, and a relatively 

 smaller internal tubercle, than the permanent sectorial. This tooth 

 displaces the last deciduous molar, which is a tubercular tooth, 

 resembling in form the first of the two upper permanent tuberculars : 

 these, coming into place without pushing out any predecessors, 

 enter into the category of true molar teeth. In the lower jaw 

 the third premolar displaces the deciduous sectorial, which has 

 three trenchant lobes, and a relatively smaller posterior talon than 

 the permanent sectorial. The fourth premolar displaces the third 

 or tubercular milk-molar. The permanent sectorial and tubercular 

 molars displace no predecessors and are therefore true molars. 



The first permanent premolar, which has no deciduous repre- 

 sentative, is not developed at any period in the Mangues {Cros- 

 sarchus), the Suricates {Ryzcena), or the Mangusta paludinosa : these 

 Viverrines, therefore, retain throughout life more of the immature 

 features of the family, and in the same degree approach nearer 



I I 



