SIWALIK AND NAEBADA BUNODONT SUINA. 
57—91 
Genus III. : SANITHERIUM, H. von Meyer. 
Species : Sanitherium schlagintweiti, H. von Meyer. 
Syn. jSus pusillus, Falconer. 
Mandible. — This genus and species are founded on some fragments of the 
mandible and lower molars of a small pig-like animal, obtained from the Siwaliks of 
Kiishalghar, Punjab, which have been already described and figured in the first 
volume.^ One of these specimens (the original of Sus pusillus of Falconer) has, 
however, been refigured in plate VIII., fig. 7, of this volume in order to show its 
distinctness from the mandible of Sus punjabiensis (ibid, fig. 9), with Avhich it agrees 
very closely in size. The specimen consists of a fragment of the right ramus, 
containing the third true molar in an early stage of wear, of which the anterior 
columns have been broken off. It will be seen that this tooth differs from the last 
molar of Sus punjabiensis by the presence of a distinct cingulum on the outer side 
of the second main outer column ; and by the very large development of the two 
hind columns {b, c) of the talon, as well as by the union of the median accessory 
column (a) with the outer main column of the tooth ; the other median accessory 
column (e) being likewise united with the same main column. A comparison of the 
Sanitherium molar with the corresponding teeth of Bippohyus figured’ in plate XII. 
will show that in all these respects, as well as in the compression of the main inner 
columns, there is a much closer resemblance between the two than there is between 
Sanitherium and Sus. The tooth of liippohyus is, however, unprovided with the 
cingulum which forms such a marked feature in Sanitherium. 
These comparisons indicate that the latter genus (as far as the very slight 
materials on which it is founded admit of its characters being defined) is more 
nearly allied to Hippohyus than to Sus. 
Genus IV. : HYOTHEEIUM, H. von Meyer. 
Syn. Amphichoerus, Brav. (?) MSS. ; Cheer omorus, Gervais, ex Lartet, MSS.; 
Cheer other ium, Lart.; Baleeochoerus, Pom. 
Synonomy. — The name Byotherium' was applied in 1834 by H. von Meyer’ to B. 
soemmeringi. In 1846 PomeP founded the genus Palceochoerus, with the two species 
P. typus and P. major. In 1851 the name Cheerotherium was ajDplied by LarteP to 
several species, one of which was named C. sansaniense ; and apparently about the 
same time Lartet’s manuscript name Choeromorus was employed by Gervais^ for two 
forms which he named C. simplex and C. mammilatus. The name AmphieJmrus, 
Bravard, is applied to certain specimens in the British Museum. In 1859 Gervais® 
1 Page 76 (58), pi. IX., figs. 6-9. 2 “Die fossile Zahne und Knociien. von GeorgensmUnd,” p. 43, pi. II. 
3 ‘ Bull. Soc. Geol. France,’ 2nd ser., vol. IV., p. 381, pi. IV. 4 “ Notice sur la Colline de Sansan,” p. 32. 
5 “ Zool. et Pal. Fran 9 ,’ 1st ed. (1848-52), p. 198, note 1 ; and explanation of plate XXXIII., p. 7. 
6 Ibid, 2nd ed., p. 182. 
