234 



M Ml; I -TIC VARIATION. 



[PART i. 



Large Premolars. 



Putorius (labelled " Vison Horsfieldii"): at the place in which 

 tin- rL'ht lower posterior premolar ("jT* ") should stand there are two 

 teeth at the same level. They are almost identical, but the inner 



A 



FIG. 52. Putorius, No. 311, right lower jaw, ground-plan of teeth and profile 

 vit v. - ,,( two teeth at the same level. Upper figure is the internal tooth. 



(upper in figure) is slightly the smaller (Fig. 52). B. M., 823, a. 



Helictis orientalis, Java : having supernumerary two-rooted 

 toe. Hi internal to and between P 2 and 7^. This extra tooth is almost a 

 copy of /<; (Fig. 53). B. M., 824, a. 



I i>.. '>'>. Ili-Hrt i* urii'iitiilis, No. 312. Surface view of upper jaw and a 

 representation of the ri^ht upper teeth as seen from inside. 



Molars. 



313. Putorius: HF.NSEF,, M, ]>!,. Jahrb., \. 1S7!, p. 540, states that he 

 h.-is several skulls of Fcetorin* i>nt<>rius with an extra upper molar on 

 one ^iiic iii ;i rudimentary condition. GIEBEL, Bronn's Kl. . Onl., p. 

 l^'i, T.-if. xv. figs. 1, 2 and 3, figures a spcriiueu of " Piiforiitu fi/jms" 

 having . -i fairly well developed extra upper molar on each side making 

 ///.: instead of m^. Pn.hahly both these accounts refer to P. foetidus. 



,>14. Lutra platensis: svipernumerary molar mi one side of upper jaw. 

 ^ni-li a i, mih normally present on both sides in L. val<tnni, -,\ fossil 

 t'orin. Vo\ HKI-;M\, .\<>r. Act, /.'>/'. Car. C'/'-x., xxix. p. 2(>. Lutra 



