( no ) 



indented and bent inwards, as is fhewn at F ; hy which means the 

 folds or wrinkles which before were in flraight lines will now be- 

 come crooked, as appears between B and D. 



To purfue my oblervations on the Fibres which compofe the fub- 

 ftance of animals, I endeavoured to inveftigate the nature of thofe 

 in a flea, confidering, that if I could difcover it in the flethy Fibres 

 and their filaments, we may be aflured, that the fame kind of for-, 

 mation prevails in all living creatures. And in this inquiry, I not 

 once or twice, but very often, moll clearly could fee the flefliy 

 Fibres in the breafl of a flea, in that part where the feet are joined 

 to it ; and I faw alfo in them the fame circular folds or wrinkles as 

 I have defcribed to be in flefliy and fifliy Fibres. Some of thefe 

 Fibres were thicker in the middle than at the extremities, as is re- 

 prcfented atfg. 7, ABCDEFGH, which is a fragment of a flefliy 

 Fibre taken out of the breafl: of a flea. Seeing this, I thought that 

 the flefliy Fibres in this minute animal, terminated in a point at the 

 extremities, and were there united to the membrane or tendon of 

 the mufcle, as I have mentioned refpedling the flefliy Fibres in an 

 ox : and I alfo faw fome of the folds or wrinkles like C F, but for 

 the mofl: part they were as at A B G H, and, at various times, I 

 thought I faw that thefe Fibres were compofed of many fmaller 

 Fibres or filaments. 



I continued my obfervations, by examining the flcfli taken out of 

 the feet of a flea, and I faw no difl'erence between the formation 

 and figure of the Fibres taken out of the breafl; and the feet, and 

 I faw more than twelve of fuch Fibres in the foot of a flea joining 

 to each other, and alfo many fmaller Fibres in which I could not 

 diftinguifli the folds or wrinkles : thefe laft I took to be exceeding 

 fmall blood-vcflels and nerves. 



I alfo took the flefli out of the feet of fmall flies and faw the 

 flelhy Fibres in them to be formed in the fame manner as before- 

 mentioned. 



The Fibres which compofe the fubflance of a whale, I alfo 



