8 
PAUNA OP THE INDIAN PLHVIATILE DEPOSITS. 
holds good to a certain extent, but it would be very difficult to find any natural 
object with which abetter comparison could be instituted, and it has been adopted in 
part by so many eminent palseontologists that it is better to carry it on than introduce 
another, though a much better one might be found if a fortification, such as a small 
Indian fort or medigeval castle, were the object adopted for the comparison. The follow- 
ing list shows the principal parts of the teeth and the letters they are indicated by 
*a. Anterior valley .+ 
*b. Posterior valley. |1 
*c. Accessory valley. 
*d. Anterior collis.§ 
*e. Median collis.^ 
*f. Posterior collis. 
ff. Anterior process=crista. •» 
hi . Median process. ?• “ Combing plates ” of Boyd Dawkins. 
712. Posterior process=crochet=uncus. ^ 
i. Median groove on outer wall of tooth. 
Costse on the outer wall. 
1. Outer wall (divided by “ i” into “ m” and “ n”). “ External lamina ” of Boyd Dawkins .f 
m. Anterior area. 
n. Posterior area. 
0 . Guard=cingulum=bourrelet=wulst. 
p. Opening to anterior valley or “ pass.” 
The left maxiUa was found in situ with its six teeth, and is figured in Plate I. 
Of the right maxilla only fragments were found loose 
in the bed of the nullah, and from these the teeth were 
The maxilla and upper molar series. 
missing, but fragments of some teeth were also found loose. The upper molars were 
unfortunately more affected by decay (whatever may have been the cause), and 
more penetrated by the veins of encrusting matter, while the great depth of the 
valleys rendered them more fragile than the lower molars. Of the teeth in the 
left maxilla p^'emolar 2 and molar 2 are much broken. Molar I and molar 3 are also 
considerably damaged : still enough remains to give a fair idea of this most charac- 
teristic part of the whole dentition. In both premolar 2 and 77iolar 2 the outer 
wall is wanting. 
The premolars of Bh. Deccanensis are specialized by the very great development 
of the ledge of enamel, known as the cingulum or guard ( Boyd Dawkins ), which 
occurs mostly on the anterior and inner walls of the teeth, and which is well shown 
in both figs. I and 2 of Plate I. I think I am right in saying that in no other 
species is this peculiar appendage of the premolars so strongly developed, and in this 
respect it resembles some of the European miocene species. Premolar I was deciduous 
and probably a very small tooth, as no sign of it can be made out on the edge of the 
maxilla. In premolar 2 a small pit,* fig. 1, Plate I, shows in the enamel ledge or 
* The equivalent terms in Latin are employed by Brandt {Bh, tichorldnus, Mem., Acad. St. Peter, 6e ser., tom. VII.) 
J Vallon oblique, in upper molars, Cuvier. 
11 Ecorchure au bord posterieur, Cuvier ; Fossette posterieur, Blainville. 
§ Colline seconde, of upper molars, Cuvier. 
^ “ La troisieme colline,” of upper molar, “ le bord posterieur de la dent.” Cuvier. 
t Collis externus, Brandt. “ Colline pi’cmiere qui suit exactement le bord.” Cuvier. 
