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says, elephants have sometimes a seventh and eighth tooth, or 

 two supernumerary teeth, in each half of each jaw. But Corse 

 is not very clear as to his terms, especially as to the term ridge ; 

 so that what he considers the seventh and eighth teeth, may be 

 the fifth and sixth. 



Dr. N. C. Keep stated that he had seen a number of supernu- 

 merary teeth in man. In several instances, he had seen duplicate 

 lateral incisors on one side ; he recollected three cases, where 

 both the natural teeth and the duplicates corresponded well with 

 the laterals of the other side, though the duplicates did not match 

 so perfectly as the others. He had seen a case of two cuspidati 

 or eye teeth on one side. Most of the extra teeth which he had 

 seen, were located in the forward part of the jaw, in or near the 

 portion occupied by the milk teeth. His impression was, that he 

 had seen an extra biscuspis, but he was quite certain that he had 

 not seen an extra molar. Most of the supernumerary teeth he 

 had seen were irregular and unsightly ; they were frequently con- 

 ical. He had recently seen a case, where two teeth had come 

 between and on a line with the central incisors ; in other cases, 

 they had protruded from the alveolar arch or bony palate behind 

 the front teeth. 



Three cases of the union of two teeth had come under his 

 observation. In one, the two central incisors of the upper jaw, 

 milk teeth, were fused into one ; in another, a central and a lateral 

 incisor were united ; in a third, two laterals, one of which was 

 supernumerary, were united. 



He had known many cases of delayed teeth being cut late in 

 life, and he mentioned a case occurring within the past year, 

 where a canine tooth had been cut by a person over fifty years 

 of age. In another case, a lady, from thirty-five to forty years 

 of age, cut two canine teeth of natural appearance, which, he 

 satisfied himself, were delayed teeth. 



In answer to an inquiry, Dr. Keep replied, that in cases of so- 

 called double teeth extending completely around the jaw, as far 

 as he had observed, the double point or edge had been produced 

 by attrition of the antagonizing teeth. He also remarked, that 

 he had casts, showing the entire absence of the second dentition 

 in adults, which he should be happy to show to the Society. 



