WILD TARPAN AND ITS RELATIONS 93 



superficial (diluvial) formations of his own country ; 

 and the title E. adamiiicus had been given a dozen 

 years earlier by Schlotheim ^ to the remains of the 

 same or a closely allied type of horse. 



At a later date the English naturalist Sir 

 Richard (then Professor) Owen," referred an upper 

 molar of a horse from Kent's Hole Cavern, near 

 Torquay, to von ]Meyer"s E. fossilis ; stating that 

 it differed from molars of domesticated horses by its 

 narrower crown — a feature that may perhaps be 

 due to its belono^ine to the deciduous, or milk, 

 series. Other upper molars from the cavernous 

 fissures in the Devonian limestone of Oreston, 

 between Plymouth and Tavistock, were assigned 

 by Sir Richard Owen^ to a second species, under 

 the name of E. plicidens, in reference to the sup- 

 posed more complex foldings, or pleatings, of the 

 enamel in the central islands, or pits, of the grind- 

 ins: surface of the crown. 



Twentv-five vears later the same naturalist* 

 described a number of equine remains from the 

 cavern of Bruniquel, in the department of Tarn-et- 

 Garonne, France, These, in place of being isolated 

 molars, comprised specimens of the complete denti- 

 tion, as well as limb-bones ; and, from the relatively 

 large size of the former as compared with the latter, 



^ Petrefaktenkunde, p. ii ; 1820. 



* British Fossil Mammals and Birds, p. 383, London, 1846. 



' Op. cit., p. 392, and Rep. Brit. Assoc, for 1S43, p. 281, 1844. 



* Owen, Phil. Trans. Roy. Soc. London, 1869, p. 544. 



