259—78 
SIWALIK AND NARBADA PROBOSCIDIA. 
the tooth into an outer and an inner division,” and because the ridges in the latter 
are not bent. Now, with regard to the first of these two negative characters, Dr. 
iPalconer himself, in describing the upper molar of S. cUftii, represented in fig. 1 of 
Plate XXX of the “ Pauna Antiqua Sivalensis,” says, that the “ mesial line of divi- 
sion of the ridges is not very distinct,'’ clearly implying that in ttat specimen there is 
a median division : other teeth are, however, described as showing no trace of this cleft. 
It is quite true that the mesial cleft is very indistinct in the upper true molars 
of S. cliftii, but it appears to me from an examination of the cast of Clift’s specimen, 
and other molars in the Indian Museum, that there is almost or quite as much trace 
of this median cleft in them as in the Chinese tooth j it may also not be improbable 
that this cleft is more distinct in the earlier teeth, which not unfrequently show an- 
cestral characters more distinctly than the later ones. There now, therefore, only 
remains the question of the curvature of the ridges. Professor Owen, in describing 
tlie Chinese tooth, himself admits that he has observed a curvature of the ridges in 
certain specimens of the molars of S. bombifrons, and this curvatm^e will be subse- 
quently shown to occur occasionally in molars both of that species and of S. insignis.. 
If, therefore, a curvature may occasionally occur in the ridges of the molars of one 
species of Stegodon which are normally straight, there appears to be no valid reason 
why it should not equally well occur in those of another. 
Since, therefore, in my opinion, there seems to be no character by which the 
Chinese milk-molar can be distinguished from the molars of S. cliftii, and since the 
milk-molar agrees with the true molars of that species in the manner of wear of the 
ridges, and in having a low ridge-formula, there appears to me to be every pro- 
bability that the Chinese tooth is really the second upper milk-molar of Stegodon 
cliftii. If this interpretation be correct, the name of S. sinensis must be expunged,, 
and the distribution of S. cliftii be extended to China. As a character of perhaps 
minor import the Chinese tooth agrees with the first true molar of S. cliftii in having 
a large number of cusps on the ridges, and in the worn enamel being much cre- 
nulated. 
Third upper milk-molar. — The tooth represented in fig. 1 of Plate XLV, collec- 
ted by Mr. Theobald in the Punjab, is a left upper molar of a Stegodon, which I for- 
merly' considered as the first true molar of S. bombifrons, but which, as will be seen 
below, I now find cannot belong to that species. The tooth is considerably worn 
and carries six ridges and a large hind-talon ; from the number of ridges this 
tooth cannot belong to S. insignis or S. ganesa, in which the two first “intermediate” 
molars never carry less than seven ridges each {vide infra). There now, therefore, 
only remains S. cliftii, to which the specimen can belong ; but before going further, 
it will be well to describe the specimen. The two first ridges of the specimen are 
so worn that their dentine surfaces have become united, and a trace of the enamel 
of the first valley remains only on the inner side. The remaining four ridges are 
also well worn ; they extend straight across the crown, and their outer is slightlv 
‘ Rec. Geol. Surv. of India, Vol. XI, p. 74. 
