66 II. Lydekker — On Foml Mammalia. 



in the foregoing list. The mandible of C. cadurcense is smaller than 

 the present specimen ; that of (7. quinqvedenfalum^ is still smaller; 

 and the same may be said of C. grucile.'^ In those forms which have 



r^ !^^^ 





'./SM.f', 



•St^ 





Fig. 2. Cmnotherium Filholi, Lyd. The right lateral aspect of the cranium and 

 mandible, from the Upper Eocene of Caylux. \. (B. M., No. M. 1440). 



no diastema, the mandible of C. laticurvatiim^ has a much larger 

 descending process at the angle ; that of C. commune * is deeper 

 posteriorly; and that of C. elongatum^ has the inferior border in 

 advance of the angle highly arcuated in place of nearly straight. 



The foregoing comparisons indicate the distinctness of the present 

 from all the seven species of Ccsnotherium recognized by Dr. Filhol. 

 A number of other species have indeed been named, but mostly on 

 insufficient specimens. The so-called C. Courtoisi, Gervais,^ is much 

 smaller than the present specimen, and together with Piclet's G. 

 Benevieri is referred by Kowalevsky (Phil. Trans., 1873, p. 25) to 

 Hyopotamus. C. collotarsum'' is founded on specimens which do 

 not prove its distinctness from other forms. The part of the 

 cranium of Meyer's Microtherium figured by Gervais in the 

 " Zool. et Pal. FranQaises " (2nd ed. pi. xxxiv. p. 7), seems to belong 

 to G. laticurvatum. From Momllactherium eJegans the present form 

 is distinguished by its superior size, by the absence of a diastema 

 between pm. 2 and pm- 3 ^ and by the presence of a third cusp ou 

 the hinder lobe of m- 3 ; it seems, however, to be allied to that form 

 by the large development of the inner cusp of pm. 3 . 



Seeing, therefore, that the present form is markedly distinct from 

 all those species of Ccsnofherium which are described upon sufB- 

 ciently perfect specimens, and as it cannot be identified with any of 

 the imperfectly known forms or with Mouillactherium elegans, it 

 seems permissible to give it at least a provisional new specific name ; 

 and that of FUholi is proposed, in honour of the describer of so 

 many of the Quercy vertebrates. The writer proposes to place 



1 Ann. Sci. Geol. vol. viii. pi. xix. figs. 314-6. 



2 Ibid. vol. xi. pi. 1. g. 3 ; vol. xii. pi. xi. fig. 58. 



3 Ibid. fig. 7. Ifiid. vol. viii. pi. xii. figs. 269-70. » Ibid. fig. 276. 

 « Zool. et Pal. Fran?. 2nd ed. p. 162. ■> Ibid. 



