40 



Mastodon pentelici, Gaudry and Lartet '. 

 Syn. Tetrabelodon ptntelici, Cope 2 . 



This species is at present unrepresented in the Museum Collection, 

 although it is important that it should be noticed here ; at present 

 it appears to be only known by immature specimens. In mm. 4 the 

 ridges are interrupted and the valleys partially .blocked by accessory 

 tubercles ; the hind talon of mm. 3 i s so largely developed as prac- 

 tically to form a third ridge (woodcut, fig. 9). The mandibular 

 symphysis is produced to a considerable extent, and is furnished with 

 incisors ; but premolars do not appear to have been developed. The 

 ridges of the milk-molars appear to be lower than in M. pandionis. 



Pig. 9. 



Mastodon pentelici. -The left upper milk-molars; from the Lower Pliocene of 

 Pikermi. \. (After Gaudry's ' Encliainements.') 



Hob. Greece, Hungary 3 , and North-west Persia 4 (Lower Plio- 

 cene). 



Mastodon falconeri, Lydekker ". 



This species is of very large size, and apparently has a short and 

 incisor-less mandibular symphysis; the cheek-teeth present trefoils 

 on one column of each ridge and resemble in general structure those 

 of M. angustidens, although they are much larger and relatively 

 wider. The species may be a more specialized descendant from the 



Comptes Rendus, vol. xliii. p. 273 (1856). M.pentelicus. 



Proc. Amer. Phil. Soc. vol. xxii. p. 5 (1884). 



See Petho, Jahresb. k. ung. geol. Anstalt, 1884, p. 63. 



See Lydekker, Quart. Journ. Geol. Soc. vol. xlii. p. 173 (188G). 



Eec. Geol. Surv. Ind. vol. x. p. 83 (1877). 



