[ 83 ] 



what remains now within it is only whatever was attached to 

 its internal coat. A great part of the cyft is even and fmooth 

 internally, but at that part of it which I conceive to have been 

 the lowermoft it is made very irregular and rough, by a great 

 number of fmall pouches of different fizes, and feveral piles of 

 bone : The contents of thefe fmall pouches are as various as 

 their fizes are different; fome. contain a gelatinous kind of 

 mucus, whilft others contain cretaceous matter. In fome I found 

 a brownifh black fluff like bone which had been melted down 

 and corrupted by putrefadion, and in others the contents refem- 

 bled fat, and felt like it when rubbed between the fingers. In 

 fome there were hairs, and in others fmall fragments of bones. 

 Some were attached by fmall peduncles, others adhered by their 

 coats. The bones were very irregular, nor can I fay that they 

 refembled in every refped any one bone of the flceleton, although 

 fome of them had a good deal the appearance of being portions 

 of the jaws : In particular, the pile, marked (b), refembled the os Plate II. 

 maxillarc fuperius, having fomething Hke a palate plate, an ^"'^ ^^^' 

 alveolar procefs, and having teeth incafed in it, as will be 

 more particularly mentioned hereafter. There were alfo feveral 

 other bones, fome round, as {c), and fome flat, as {d), but neither of 

 thofe could be likened to any of the bones of the fkeleton : They 

 were all covered with a tough, tenfe, white membrane, which 

 adhered very firmly to them, and refembled much the common 

 periofieum : This was again covered by a produdion of the 

 internal coat of the cyfl ; and feeling the bones through this 

 thick coat, I once imagined that the flat ones were ribs, 

 and that the round one was the fkeleton of a fcetufe's 

 leg and foot, more efpecially as there was a joint ; but 



L2 



upon 



