SHYALIK AND NAEBADA BUNODONT SUINA. 
61—95 
America/ wliere it occurs in the miocene. In Europe it ranges from the upper 
eocene (Quercy phosphorites) to the middle miocene (Sansan stage) ; and is found 
from France to Styria. Its distribution in India will be mentioned in the sequel. 
Species : Hyotherium sindiense, nobis. 
History. — In 1878 the present writer briefly mentioned^ some detached molar 
teeth of a suilline animal obtained by Messrs. W. T. Blanfqrd and F. Fedden from 
the lower Siwaliks of Sind, which were referred to Hyotherium, with the provisional 
name of IT. sindiense. It is these and other specimens from the same region which 
form the subject of the present notice. 
Tipper cheek-teeth. — In plate XII., fig. 6, there is represented a fragment of the 
left maxilla containing the second and third true molars of a suilline animal, which 
from the form and structure of these teeth may probably be referred to the present 
genus. Both teeth are well-worn, but are unfortunately much decayed, so that the 
characters of their worn surfaces cannot be determined. In size and contour they 
agree almost exactly with the corresponding teeth of H. soemmerinyi figured by 
Peters.^ In figure 12 of the same plate there is represented an unworn molar of the 
right side, which from its agreeing in size with m. 2 of the last specimen may be 
regarded as the homologous tooth of the same species. This tooth agrees very 
closely with m. 2 of II. soemmerinyi, with the exception of having no cingulum on the 
outer surface : the accessory columns [a, y, IT) are more strongly developed and 
have a more complete union with the inner main columns than is the case with H, 
waterhoiisi,^ or TL typus ; the molars of which are also distinguished by the more 
square form of the summit of their crowns.® The present tooth is distinguished 
from m. 2 of a true pig like Slis hysudricus (pi. VIII., fig. 10) by its relatively wider 
cro'wn, and by the columns being lower, and somewhat more distinctly defined : it 
is, however, almost exactly intermediate between tlie corresponding tooth of II. 
typus and N. hysudricus. In fig. 11 of the same plate there is represented a half 
worn right upper molar which might well be m. 1 of the same species as the last 
specimen : a tooth described in the sequel indicates, however, tliat it might be m 2 
of a smaller form. In this specimen there is a distinct crenulated cingulum on the 
outer side of the posterior outer main column ; — a similar cingulum girding both 
columns in II. soemmerinyi. In fig. 10 of the same plate there is represented a still 
more worn (probably) left molar agreeing in size with the last specimen. In figures 
13 and 14 of the same plate there are represented two similar right upper molars of 
smaller size than any of those described above. These teeth are of too small a size 
to have been m. 1 of an individual of the size of those to which figs. 6 and 12 
belonged ; but if the specimen represented in fig. 1 1 were a second molar they 
1 The correctness of Prof. Cope’s generic determination is of course assumed. 
2 “ Records,” vol. XI., p. 77. 3 Op. dt., pL I., fig. 1. 4 Filhol, op. cif., pi. VI. 
5 It is somewhat difficult to give a correct estimate of the relative proportions of the crowns of the molars of many 
species, owing to the circumstance that the outer walls of the base of the crown arc very sloping. 
