Microscopical Essays, 



of the laft ring, A is much broader than it was in the preceding 

 ring ; one extremity of it is contracted, and communicates with 

 B ; the lower infertion is at the membrane I, which is the exterior 

 fldn of the fcecal bag. 



It may be proper to obferve, that the mufcles, A and B, of the 

 lower part of the laft ring, cannot be feen until a large mufcle is 

 removed, which on one fide is fixed to the fubdivifion of this 

 ring, on the other to the fcecal bag. 



The right mufcles B are alfo twelve in number ; they begin at 

 the fecond ring, and grow larger from thence to the 7th : from 

 the 7th to the fubdivifion of the 1 2th they are one-half narrower ; 

 the deficiency in width is fupplied by the fix mufcles C, which 

 go with it from the 7th to the fubdivifions of the 12th ring. The 

 mufcles B and C have a lateral communication at the 8th, nth, 

 and 12th divisions; C is wanting at the fubdivifion of the 12th 

 ring ; it s place is filled up by B, which becomes broader in that 

 part. 



We have now only to fpeak of the three floating mufcles V. 

 The firft of thefe originates at the firft ring, from whence it intro- 

 duces itfelf under N, where it is fixed, and then fubdivides 3 and 

 paffes under parts which render it invifible in this figure. 



The fecond floating mufcle begins at the fecond divifion, being 

 fixed to the anterior extremity B of the fecond ring ; from thence 

 it directs itfelf towards the ftomach, and after communicating 

 with the cafe of the corpus craffum, it divides and fpreads itfelf 

 into eight mufcles, which run along the belly. 



The 



