FALCONER JIASTODOST AND ELEPHAXT. 819 



belonging to the collection of my coadjutor, Colonel Sir Proby 

 Cautley, and consisting of the right upper and lower antepenultimate 

 true molars of the same animals. They are in the most favourable 

 state of use for observing all the characters. The upper molar has 

 a crown composed of twelve well-defined principal ridges, with a front 

 and a back talon. The seven anterior ridges are in wear, presenting 

 open transverse disks with the enamel-borders strongly crimped. 

 The posterior talon consists of a narrow sj)lcnt appended to the last 

 ridge. The dimensions are — 



inches. 



Length of crown 7 



"Width of ditto at second ridge 2-5 



"Width of ditto at eighth ridge 2-5 



"Width of ditto at eleventh ridge 2-2 



Height of ditto at seventh ridge 6-9 



The corresponding tooth of the lower jaw presents a crown also 

 having twelve principal ridges, with a distinct front and back talon. 

 The nine anterior ridges are in use, the front talon in this instance, 

 as also in the upper tooth, being confluent with the disk of the an- 

 terior ridge ; the posterior talon is a narrow splent. The disks of 

 "wear are transverse, open, free from mesial dilatation, and the enamel 

 plates well crimped as in the upper molars. The dimensions are — 



inches. 



Length of crown 7'5 



"Width of ditto at second ridge 2-1 



"Width of ditto at eighth ridge 2-4 



Height of ditto at ninth ridge 5-6 



In these two specimens the character which most obviously dis- 

 tinguishes the Euelephants from the Loxodons is well manifested — 

 namely, the great height of the crown relatively to the width. In 

 the upper antepenultimate, the height of the seventh ridge is almost 

 equal to the length of the crown. The dimensions of these teeth 

 render it certain that they are not the last milk-molars. 



A detached right upper antepenultimate true molar, in the Museum 

 of the College of Surgeons (no. 2802, Osteol.Catal.), shows also twelve 

 principal ridges, with front and back talons. The dimensions of this 

 specimen are — 



inches. 



Length of crown 6-8 



Greatest width of crown 2-5 



Greatest height of ridge 5-5 



A lower jaw in the same collection (no. 2670) shows the ante- 

 penultimate in fine preservation, presenting distinctly twelve prin- 

 cipal ridges, with talons. The dimensions are — length G inches, 

 greatest width of crown 2-1 inches. As compared with Sir Pi'oby 

 Cautley's specimen, it is of small size. 



On the other hand, a perfect specimen of an upper antepenultimate 

 in the same museum (no. 2803) shows fourteen principal ridges, 

 besides front and back talons. The dimensions arc — 



VOL. XXI. PAKT I. z 



