MEHYCOPOTAMIDJS. AJSTrRRA.COTILEBIID.E. 215 



noticed in 'Falconer's Palaeontological Memoirs,' vol. i. 

 p. 416, under the name of M. nanus ; its length is 0,195 

 and its width 0,020. The writer proposes to figure the 

 specimen in the Introduction to the third volume of 

 series 10 of the ' Palseontologia Indica.' 



Made in the Museum, 1885. 



Fig. 28. 



Merycopotamus pusillus. The third right upper true molar ; from the Siwaliks 

 of Khushalghar. }. Indian Museum, Calcutta. (From the ' Palaeontologia 

 Indica' 1 .) 



Family ANTHRACOTHERIULE. 



Dentition (usually) : I. ?, C. \, Pm. ^, H. | : in Anthracotherium 

 gresslyi the premolars are ^. The upper true molars are imperfectly 

 selenodont, and have four columns on their crowns, three of which 

 are situated on the anterior, and two on the posterior lobe. Except 

 in Diplopus, where they are reduced to two, the digits are four in 

 number on each foot ; the metapodials and the navicular and cuboid 

 are always separate. 



Genus DIPLOPUS, Kowalevsky 2 . 



This genus is known solely by limb-bones and vertebrse, which 

 present a strong general resemblance to those of Hyopotamus. Ko- 

 walevsky conjectured that the teeth were like those of the latter ; 

 but no such teeth are known from the Headon beds. The teeth of 

 Dichodon from the same beds indicate a smalliT animal. Till the 

 dentition is known, the position of Diplopus must remain uncertain. 



1 By the courtesy of the Superintendent of the Geological Survey of India, this 

 figure has been permitted to appear before its publication in the ' Palseontologia 

 Indica.' 



2 Phil. Trans, for 1873, p. 30 (1874). 



