ELEPHAS MERIDIONALIS.— DENTITION. 201 



Another interesting specimen (No. 215 a of the Gunn Collection, Norwich Museum) 

 ■was, according to a label attached to the jaw, " dug out of the Elephant Bed between 

 the Coal and Cart Gaps, Bacton." It is covered with the debris of the Eorest Bed, and 

 represents a fragment of a right lower ramus containing the diasteme (injured), with the 

 horizontal ramus entire up to the commencement of the ascending portion. 



The jaw holds the last five ridges of the second and the first five ridges of the 

 ultimate tooth, presenting a united worn surface of 10 inches in length. The specimen 

 is described by Falconer. 1 I append, however, several measurements. 



The remaining five ridges of the fifth molar, and the five ridges of the sixth, are 

 contained in a space of 4'9 and 63 inches respectively. The maximum breadth of the 

 crown of the fifth molar is 4 inches, while that of the ultimate is 3*5 inches ; the 

 discrepancy in the latter arises from the tooth being not so much advanced in wear as its 

 predecessors, seeing that only four of the five ridges are detrited. The ridge formula is 

 undeterminable, but the massive dimensions of the teeth and their characters are precisely 

 as in the preceding. 



The diasteme is injured, but clearly shows that it was not so erect as in the Mammoth 

 and E. antiquus. The mental foramina maintain the same irregularity as to position 

 observed in the preceding, and in all Elephants' mandibles ; here one foramen is fully 

 two inches from the margin. 



The length from the anterior border of the coronoid to the commencement of the 

 diasteme is 10 inches. 



The height of the jaw to the alveolar border in front of the coronoid is 7*5 inches. 



Length of the diasteme 8 inches. 



Breadth of the ascending ramus at its commencement 7 inches. 



Height of the jaw at the commencement of the diasteme 9^ inches. Height at the 

 insertion of the coronoid 7^ inches. 



The characters of this ramus and its teeth are precisely like the foregoing jaw. 



The lower jaw described by Falconer 2 was discovered on a cliff near Mundesley, and 

 is now in the Norwich Museum, to which it was presented by R. Barclay, Esq. It is 

 not so well preserved as the preceding, but contains more of the jaw, seeing that portions 

 of the two rami are preserved. The ultimate molars are present, but much mutilated ; 

 nevertheless, wherever these and the jaw admit of comparison, they are quite in accord 

 with the two fragments just described, and doubtless represent the mandible of the same 

 species. 



A fourth fragment (No. 368 of the Gunn Collection) from the Forest Bed repre- 

 sents a right lower ramus without teeth, but the sockets of both are entire. The last is 

 just commencing wear, with a deep pit in front, possibly for the anterior fang or else a 

 fragment of the second molar. The coronoid is also nearly entire, with an almost perpen- 



1 'Pal. Mem.,' vol. ii, p. 133. 



2 Op. cit., vol. ii, p. 140. 



