114 



TEOF. W. BOYD DAWKINS ON A PLIOCENE [May I903, 



Two highly compressed left upper carnassials (PL VIII, figs. 2 & 3) 

 also belong to the same species, as may be seen bj the following 

 measurements : — 



Left upper carnassials of Machairodus. 

 (Measurements in millimetres.) 



u 

 o . 



11 



6 3 



© 



02 



a> 

 >■ 



02 



a 



e 



■+3 

 O 



<D 

 fi 



7 

 6 



8 



03 



S> 



>■ 



a 



c 



■+-' 



S 



10 

 10 



9 



02 



a 



2 <* 

 t E 



2 £ 



o 

 (in 



10 

 10 



8 



M. crenatidens, pm 4. Dovekoles (PL VIII, fig. 2) ... 



Do. Do. (PI. VIII, fig. 3) ... 



Do. Val d'Arno, Fabrini (PL VIII, 



fig. 4) 



39 

 39 



43 



28 



M. cultridens, 1 pm 4. Mont Perrier (Auvergne) 



The specimens from Doveholes are slightly smaller than the type 

 of Prof. Fabrini, from the Val d'Arno (PL VIII, fig. 4), but are 

 too large to be assigned to M. cultridens. One (PL VIII, fig. 2) has 

 an accessory cusp in front of the main conical cusp (b). All the 

 three cusps (h, a, & c) are highly compressed parallel to the median 

 line, and form one scissor-edge, divided into sections by deep vertical 

 grooves. The accessory cusp seen in fig. 2 has probably been worn 

 away from the anterior portion of fig. 3 (PL VIII). It is absent 

 from Prof. Fabrini 's type. The inner surfaces of these teeth are too 

 much worn to be described. 



Dr. Boule has called attention to the striking resemblance between 

 the upper carnassials of Machairodus and the upper milk-carnassial 

 of Felis spelcea. It may be added that the same resemblance runs 

 through the whole adult dentition of Machairodus, when compared 

 with the milk-dentition of Felis spelcea ; as may be seen from the 

 comparison of the specimens in the British Museum (Natural History) 

 with pi. xiii of Dawkins's & Sanf ord's ' British Pleistocene Felidae/ 

 1868 (Monogr. Pakeont. Soc). 



The lower portion of the shaft of a right tibia (PL XI, fig. 1) 

 corresponds in its main details with that of lion, and more particu- 

 larly with a specimen of Felis spelcea from Sandford Hill Cave, 

 figured by Mr. Ayshford Sanford and myself. 2 The measurements 

 are as follows : — 



1 M. meg anther eon of Gervais. 



- Monogr. Pakeont. Soc. vol, xxi, 1867 [1868] ' Brit, Pleistoc. Mammal, pt. ii, 



elis spelcea ' p. 124. 



