PROF. W. BOYD DAWKINS ON AILTJRUS ANGLICUS. 



229 



the interspace between a and b, in both the fossil and the recent 

 (figs. 6 and 7). The cusp b of the fossil is obtusely pointed and sepa- 

 rated by a cleft from the third cusp c. Behind this cleft in the fossil 

 is a small accessory cusp b' (fig. 4), which I have only been able to 

 note as a mere rudiment in one recent tooth belonging to an Ailurus 

 shot by Mr. B. H. Hodgson in Nepaul. The third cusp, c, is small 

 and mapped off from the back cusp f by a slight valley. In all these 

 points the fossil agrees with the recent specimens. On the inner side, 

 the front lobe d of fig. 3 is mapped off from a by a cleft, and bears a 

 talon in front. In the living Ailurus (fig. 6), the talon has developed 

 into a basal cusp d'. The fractured surface of the tooth (figs. 2 and 3) 

 behind d renders it impossible to compare the inner margin mi- 

 nutely with the recent specimens ; enough, however, remains to 

 prove that it is composed of small tubercles running from d to f, 

 like those in Ailurus fulgens (fig. 6, e). The cusps of the fossil are, 

 as a whole, larger, blunter, and less clearly defined from one another 

 than in recent Ailuri. 



On a comparison of the fossil with the recent jaws of Ailurus, 

 the only marked point of difference is that the dental foramen is 

 situated further back in the former than in the latter. These 

 differences are not, in my opinion, of more than specific value ; and 

 I therefore propose the name of Ailurus anglicus for the fossil, from 

 its discovery in East Anglia. 



§ 3. Measueements. 



The following Table gives the comparative measurements of the 

 teeth and jaws of the fossil and recent Ailuri in inches and tenths. 



Teue Molae 2. 





Ailurus 

 anglicus, 

 Dawkins. 



Brit. 



Ailurus 

 fulgens. 



Mus. 



Aw 



Ailurus 

 fulgens, 

 226. g. 



liength . 



0-70 

 040 + 

 0-32 + 

 0-38 + 



048 

 0-23 

 0-20 

 015 



045 

 0-22 

 0-22 

 0-15 



Breadth of front lobe 



Breadth of middle 



Breadth of back 







The Lowee Jaw. 





Ailurus 

 anglicus, 

 Dawkins. 



Brit. Mus. 



Ailurus 

 fulqens, 

 226. h. 



Ailurus 



fulqens, 



226. g. 



Depth behind m 2 



Circumference 



0-95 

 2-5 

 0-87 

 24 



0-81 

 0-61 



0-75 



0-58 









