FALCONER MASTODON AND ELEPHANT. 307 



The dimensions are — 



inches. 



Length of crown 9-2 



Width of crown at second remaining ridge .... 3-6 



The antero-posterior convexity of the grinding-surface determines 

 the tooth to be an upper molar. 



Pigs. 15 and 15 a represent a very remarkable fragment, of enor- 

 mous width. It is worn down close to the base, the grinding-surface 

 being somewhat convex from front to rear. The remains of seven 

 disks of wear are visible. They are irregularly expanded, and the 

 surrounding plates of enamel are thick and deeply channelled on the 

 outer surface, but with only a verj^ slight amount of crimping. The 

 specimen is dark and heavy, and patched over with fresh marine 

 incrustations. 



The dimensions are — 



inches. 



Length of the fragment 5-4 



Width of crown „ „ . . 4-9 ! 



The same plate, 14 B, contains a representation, fig. 16, of an 

 entire upper molar, comprising from sixteen to seventeen ridges 

 within an extent of 11 inches. Only three of the anterior ridges 

 are worn, the rest being intact. I now regard it as a molar of JS. 

 (^Euelephas) antiquits, and not of E. meridionaUs. 



Captain Alexander discovered in the Mammaliferous Crag of 

 Easton, near Southwold, a very fine specimen, of which no figure has 

 as yet been published, of a last upper molar, right side, of E. meri- 

 dionaUs, which I have had an opportunity of examiaing. The crown 

 presented twelve principal ridges ; the back talon was wanting. A 

 small portion of the tooth was broken on one side in front, but the 

 unfractured bend of the enamel round the opposite side proved that 

 the crown showed nearly its entire length. This tooth resembled 

 in every respect (making allowance for the difference of upper and 

 lower) the specimen already described, found by Mr. Prestwich in 

 the Crag, near Norwich. The three first ridges alone were touched 

 by wear, the rest being intact. The ridges were broad, with wide 

 interspaces, the enamel very thick and rugous, both from deep ver- 

 tical channelling, and from close-set, transverse, wavy wrinkles of 

 the surface. The digital processes were large and distinct. The 

 ninth ridge presented five digitations. There were no fangs. The 

 enamel plates of the front ridges were nearly straight, and quite 

 free from crimping. This tooth was at once distinguishable from 

 the corresponding upper molar of E. primigenius or of E. {Eueleplias) 

 antiquus, by the thickness and low elevation of the ridges relatively 

 to the width of the crown. 

 The dimensions were — 



inches. 



Length of crown 9-6 



Width of crown in front 3*6 



Height of „ at the fourth ridge 4-5 



„ „ at the penultimate ridge . . 3*1 



