272 THEORY OF THE EARTH. 



porinum. Besides its subgeneric characters, it 

 differs from the anaplotheria and xiphodons, in 

 having two small and slender toes on each foot, 

 at the sides of the two large toes. 



We do not know if these lateral toes exist in 

 the two other dichobunes, which are small, and 

 scarcely exceed in size the common Guinea pig *. 



The genus of Anthracotheria is in some de- 

 gree intermediate between the palaeotheria, ana- 

 plotheria, and hogs. I have named it so, because 

 two of its species have been found in the lignites 

 of Cadibona, near Savone. The first approached 

 the rhinoceros in size ; the second \\ as much 

 smaller. They have also been found in Alsace, 

 and in the Velay. Their grinders are similar to 

 those of the anaplotheria ; but they have project- 

 ing canine teeth f. 



The genus Cheropotamus is found in our gyp- 

 sum deposits, where it accompanies the palaeothe- 

 ria and anaplotheria, but where it is of much 

 rarer occurrence. Its posterior grinders are square 

 above, rectangular below, and have four large 

 conical eminences surrounded with smaller ones. 



* Regarding the Anaplotheria, see the whole of the 3d 

 volume of my " Researches," and particularly p. 250 and 

 396. 



t " Researches," vol. iii, p. 398 and 404; vol. iv. p. 

 501 ; vol. v. part ii. p. 506. 



