part 1 .] Ly(letter: Vertebrata front. Tertiariex and Secondaries of India. 33 
The jaw is arcuated on the inferior border, and is of great depth ; the sectorial molar 
has two outer lobes,—an accessory lobe on the inner side of the second of these lobes, and a 
talon; the premolars have the same general form as in Ictitherium; the crown of the last 
molar is not shewn. The length of the sectorial molar is 07 inch, of the last premolar 0'57 ; 
the depth of the jaw is 097 inch ; the specific differences between this species and I. robus - 
turn will he subsequently pointed out. 
The lower jaw of this genus is distinguished from that of Hycena by the presence of 
two molars; from Qido and Putorius by the presence of the inner lobe on the sectorial» 
the dental formula of Ictitherium is the same as in Martes and Vivena, but the jaws of 
the two latter genei’a are much more slender, and the form of the teeth is also somewhat 
different. 
Dinotherium and Antoletherium. 
Among a collection of specimens lately received in the Indian Museum from the Asiatic 
Society, the original lower jaw, from a drawing of which Dr. Falconer founded the genus 
Antoletherium, has been discovered. Dr. Falconer’s notes on the drawing will be found in the 
“ Palaeontological Memoirs” (vol. I, p. 4,16), where a copy of Colonel Baker’s drawing is also 
given (PI. 34). This drawing, however, is incorrect; the centre tooth (B) should have three 
in place of two transverse ridge's, while the tooth on the right (0) should have but one ridge. 
From a note on page 417 of the Paleontological Memoirs it seems that Dr. Falconer subse¬ 
quently received a correct sketch. 
In the same collection, I have also found a portion of a lower jaw with two slightly 
worn molars from the Siwaliks, which undoubtedly belongs to Dinotherium, but which is 
remarkable for having an incomplete longitudinal ridge between the transverse ridges of the 
molars, which when worn down would resemble the pattern of the molars of the so-called 
Antoletherium; a smaller and less complete ridge is found in the lower molars of Dino¬ 
therium giganteum. No other animal but Dinotherium has a single three-ridged tooth 
between two-ridged teeth, as occurs in the so-called Antoletherium. 
I think that there can be no doubt but that the lower jaw, to which the name of 
Antoletherium has been applied, really belongs to Dinotherium, and that the former name 
must bo abolished. The central tooth (1st molar) of the Attock jaw agrees precisely in size 
with the first upper molar of a Dinotherium, from the same locality noticed by Falconer, on 
page 414 of the first volume of the “ Palaeontological Memoirs,” and which I have figured as 
D. pentapotamice in a forthcoming number of the “ Palaaontologia Indicathe two doubtless 
belong to the same species. The jaw in question affords additional proof of the specific 
distinctness of the Punjab Dinotherium ; both of the re-discovered specimens will be subse¬ 
quently figured in the “ Palceontologia Indica.” 
Hyajnarctos Sivalensis, Falc. and Cant. 
Mr. Theobald has lately sent down a nearly perfect mandible of this species, which is 
exceedingly important, as it shews that, from the incompleteness of his specimen, Professor 
Owen was led astray in assigning the teeth to their proper position in the series. The new 
specimen shews the three true molars, and the sockets of the premolars; the last molar has 
a circular crown, and is not shewn in the specimen figured by Professor Owen in his Odonto¬ 
graphy (PI. 131). From the absence of this tooth, Professor Owen considered the second 
molar as the last of the series, the carnassial as the second molar, and the last premolar as 
the carnassial ( Odontography, p. 504). The new specimen shews that the carnassial is 
much larger than any of the other teeth, and that the form of the last molar agrees more 
nearly with the same tooth in the true Bears than was the case according to Professor 
Owen’s interpretation of the homologies of the teeth. A figure of the new specimen will 
appear in the “ Palamntologia Indica.” 
