52ff APPENDIX. 



different bones of the fingers are of considerable 

 length, being nearly equal to one half of that of 

 the bone ; and this construction of the parts gives 

 firmness, with some degree of pliability, to the 

 whole. 



As this order of animals cannot be said to have 

 a pelvis, they of course have no os sacrum, and 

 therefore the vertebra are continued on to the end 

 of the tail ; but with no distinction between those 

 of the loins and tail. But as those vertebrae alone 

 would not have had sufficient surface to give rise 

 to the muscles requisite to the motion of the tail, 

 there are bones added to the fore-part of some of 

 the first vertebrae of the tail, similar to the spinal 

 processes on the posterior surface. 



From all these observations we may infer, that 

 the structure, formation, arrangement, and the 

 union of the bones, which compose the forms of 

 parts in this order of animals, are much upon the 

 same principle as in quadrupeds. 



The flesh or muscles of this order of animals is- 

 red, resembling that of quadrupeds, perhaps more 

 like that of the Bull or Horse than any other ani- 

 mal : some of it is very firm ; and about the breast 

 and belly it is mixed with tendon. 



Although the body and tail is composed of a 

 series of bones connected together and moved as 

 in fish, yet it has its movements produced by long 

 muscles, with long tendons ; which renders the 

 body thicker, while the tail at its stem is smaller 

 than that of any other swimmer, whose principal 

 motion is the same. Why this mode of applying 



