SIWALIK AND NAEBADA PEOBOSCIDIA. 
5— 18G 
of Binotherium, are smaller and narrower than the two anterior ridges and the anterior 
valley, as is the case in our specimen ; while, as a fourth proof, the right-hand tooth 
is the larger of the three, aod must consequently be the last of the series. Prom the 
form of the worn dentine surface of the second true molar of our specimen, it is 
clear that the fragment belongs to the left ramus of the lower jaw ; the right-hand 
tooth of this specimen, therefore, corresponds with the first ridge of the left-hand 
tooth (second true molar) of the specimen drawn in fig. 1 of the same plate. 
Neither the last premolar nor the first true molar of this specimen carry any 
talon-ridges ; the anterior extremity of the second true molar is likewise not fur- 
nished with any talon. The longitudinal bridge connecting the transverse ridges of 
the last premolar is higher than the similar bridge connecting the two anterior 
ridges of the first true molar ; there is a large blunt tubercle placed on the outer- 
side of the anterior valley of the last-named tooth. 
Lower jaw from Sind. — The fine specimen of the greater portion of the low^er 
jaw of a Binotherium represented on Plate XXX, was obtained by Mr. "W. T. Blanford 
from the Siwaliks (Alanchars) of Sind in 1877, and has already been briefly noticed 
by me in the “ Eecords.”^ The specimen comprises the middle portion of the left 
ramus of the mandible, and contains the last premolar and the three true molars, all 
in a very fine state of preservation. The two teeth on the left of the figure will corres- 
pond in serial position to the two complete teeth represented in fig. 3 of Plate XXIX 
(last premolar and first true molar), while the two teeth on the right correspond to the 
two teeth represented in fig. 1 of the same plate (second and third true molars). 
The mandible is abruptly broken off at both extremities of the series of teeth ; 
the middle of the specimen is, however, complete, so that the depth of the jaw can be 
ascertained. The enamel of the first ridge of the last true molar is only slightly 
perforated by wear ; from which we may conclude that the animal to which the jaw- 
belonged had only just attained its maturity at the time of its death. 
Last premolar . — The last premolar is a simple two-ridged tooth, distinguished 
from the corresponding tooth in the European Binotheria by the absence of 
the large anterior talon, which always occurs in the European forms. A low- 
longitudinal bridge connects the two transverse ridges of this tooth; owing, however, to 
the incapacity of the native artist who drew this specimen, this longitudinal bridge 
is not distinctly apparent in the figure : this bridge is not so high as the one in the 
homologous tooth represented in fig. 3 of the preceding plate, but if the tooth 
were still more worn down, the dentine of this longitudinal bridge w^ould be exposed, 
and would then connect by an isthmus the dentine surfaces of the fore-and-aft 
transverse ridges, which at present form islands ; this connection would not, however, 
take place so soon as in the homologous tooth of the other specimen. 
First true molar . — The first true molar is of the same width as the last pre- 
molar ; and, as is always the case, this tooth carries three transverse ridges ; the 
exposed dentine surfaces of the two anterior transverse ridges are connected by an 
