25 



dence between the number of vertebras and ribs 

 in both animals, that there were nineteen pair of 

 the latter, it was only necessary in four or five 

 instances where there was not a complete pair, 

 either to m.ake an artificial counterpart, or to 

 take the same formed rib from the collection 

 found at Captain Barber's. In this manner the 

 two skeletons were formed, and are in both in- 

 stances composed of the appropriate bones of 

 the animal, or exact imitations from the real 

 bones in the same animal, or from those of the 

 same proportion in the other : Nothing is ima- 

 ginary, and what we do not unquestionably 

 know, we leave deficient; which happens in 

 only two instances, the summit of the head and 

 the end of the tail. 



The tusk which belongs to the skeleton at 

 Philadelphia, I have brought with me : in taking 

 it from the ground it was broken into three 

 pieces, but they were carefully put together, and 

 give the intireform, composed of a strong arch 

 and a spiral twist resembhng an ox's horn, ten 

 feet six inches in length and twenty-one inches 

 in circumference. In the Leverian Museum 

 there is a fossil elephant's tusk found in England, 

 about seven feet in length : On making a com- 

 parison between these it will be observed, that 



