1841.] 



Note on the Fossil Jaw sent from Jubbulpore. 



621 



the arch above the teeth rises to the side of the curved alveola of 

 the tusks and the suborbital part of the malar bones ; (5) the length 

 of the jaw. I take these peculiarities in the order in which I have 

 mentioned them. 



1. The narrowness of the teeth. — Upon comparing our fossil with 

 two fossil sculls, both I believe from the valley of the Nerbudda, and 

 three recent ones in the Museum, I find the following dimensions as to 

 breadth of the teeth : — 



Incisor. 

 2.8 



The Fossil, 



A. First Fossil Scull (perhaps) „ i 

 Mastodon Elephantoides,. J 



B. Second, 



Recent Sculls ordinary sizC; 

 1st 



ze, J 



3.0 

 3.1 



Molar at the ridges. 

 2.4 



3.5 

 3.2 

 2.9 



2nd 2.8 3.1 



Large one, ... .. 3.8 ... ... 3.9 



It will be seen that Cuvier, whose note I copy at pp. 624, 625, says 

 that the breadth of the teeth of the fossil elephant (speaking of that of 

 Siberia) is greater than that of the teeth of the* modern Indian ele- 

 phant, the fossil ones being from 0.08. (3.3 Ins. Eng.) to 0.09 (3.7 

 Ins. Eng.) while the recent ones are from 0.06. (2.7 Ins. Eng.) to 

 0.07 (3 Ins. Eng.) In connection with other measurements of length 

 and breadth, this variation in our fossil seems of much import. 



2. Depth of the sulcus formed by the teeth and palate at its deepest 

 part. — I cannot distinguish that any part of the palatal bone has been 

 chiselled away, and thus I assume this remarkable difference to exist. 

 I measure it at the deepest part I can find, which is generally near the 

 angle. 



Depth from face of teeth to palate. 

 Inches. 



The Fossil, 



A. First Fossil Scull, 

 perhaps Mast. 

 phantoides ^ 



B. Second. 



[ Scull, -J 

 5t. Ele- 1 

 ) 



4.0 



1.0 



2.4 



and some matrix appa- 

 rently remaining, 



palate perfect, 

 palate perfect. 



* Taking, as will be explained, (§3), the posterior plates or part of them to have 

 been used as molars. 



