Microscopical 



Essays. 



345 



m, two mufcles of the fame obliquity, placed one on the other; 

 the head of it is inferted in the (kin, under the mufcle /3, and 

 communicates, by a bed of fibres, with the tail of the mufcle 7; 

 the other end is fixed to the intermediate inferior line, at the fold 

 of the third divifion. 



n is large and broad ; it covers the lower edge of the cavity of 

 the limb, and the extremity of the tail of 1 ; the firft fixture is at 

 the fkin, near the intermediate line, from whence it goes in a 

 perpendicular direction towards m, and introduces itfelf under 

 o and m, where it is fixed. 



o is narrow and bent, and covers a little the edge of the cavity 

 of the leg ; one end terminating there, the other end finifhes at 

 the third divifion near m. 



p is alfo f;ent ; it runs near the anterior edge of the cavity of 

 the leg ; one end meets the head of o, the other end terminates 

 at a raifed fold, near the inferior line. 



On the fide of the lateral mufcle o there is a triangular mufcle, 

 fimilar to qof the following ring; it is entirely concealed in this 

 by the mufcle m. 



Third Ring. 

 This ring has no mufcle, fimilar to rn of the preceding ring. 



Uu k only 



