212 



MERISTIC VARIATION. 



[part I. 



Increase in number of Premolars. 



A. Wild Canid^e. 



222. C. dingo : specimen having two closely similar teeth between p* 

 and the canine in each upper jaw 1 . Both the teeth had the form and 

 size of a premolar. This not a case of persistent milk-tooth, Nehring, 

 A., Sitzb. naturf. Fr. Berlin, 1882, p. 66. 



C. dingo : on right side p] is in place, and there is an alveolus for 

 second tooth of about same size. On left side P 1 is rather small. L. M. 



C. lateralis, Gaboon. On 1. side p^ is single, but on rt. side 

 there are two almost identical teeth between P^ and the canine : 

 of these the most anterior is level with, but slightly smaller than, 

 left £. (Fig. 40) B. M., 1689, a, (See Mivart, P. Z. 3., 1890, 

 p. 377.) 



223. 



224. 



225. 



226. 



227. 



228. 



229, 



Fig. 40. Cants lateralis, No. 224. View of canines and front premolars of the 

 upper jaw. p l of the left side is in symmetry with two teeth on the right side. 



C. vulpes : in 142 skulls, one case of two teeth between p z and 

 canine (sc. five premolars) in left upper jaw. Hensel, I. c, p. 548. 



In C. vulpes the root of p 1 is not rarely partly divided into two by 

 a groove of variable depth. The division is sometimes nearly com- 

 plete, as in C. S. M., 651. 



C. mesomelas : two teeth between p 2 and canine in left lower 

 jaw, anterior the larger. Doxitz, Sitzb. naturf. Fr. Berl., 1869, p. 41. 



Division of p' 2 



C. viverrinus : left p? represented by two teeth, each having one 

 root. Of these the anterior is tubercular, while the posterior is rather 

 long from before backwards. Anterior premolars normal. L. M. 

 (Compare Sledge-dog, No. 237.) 



Reduplication of p*. 



C. mesomelas : inside right upper p 3 is a supernumerary tooth 

 which nearly resembles p A , but is a little smaller; lower jaw normal. 

 C. S. M., 643. (See Nos. 226 and 247.) 



C. lupus: in addition to irregularities in position of teeth, there is a doubtful 

 appearance as of an alveolus inside left P^ which is displaced outwards. C. S. M., 624. 



1 Mivart, I.e., by mistake quotes this case as one of extra teeth above and below. 



