Microscopical Essays;. 



343 



Anterior Part of the twelfth Ring. 



The on]y gaftric mufcle left here is e ; it is placed on the inter- 

 mediate inferior line ; in it's dire&ion it feparates from it's lateral^ 

 and is inferted at the folds of the upper divifion, and at the fub- 

 divifion of this ring. 



Lower Part of the twelfth Ring. 



c is a large mufcle, with feveral divifions ; one placed under 

 (b) of the preceding figure, one extremity is fixed near the lateral 

 line, at the fubdivifion of it's ring, the other to the fcecal bag, a. 

 little lower than the mufcle b. 



Explanation of Fig. 4, Plate XIL 



All the gaftric mufcles defcribed in the preceding figure dis- 

 appear in this, as well as all thofe lateral and dorfal ones whofe 

 letters are not found in this figure. 



First Ring, 



e f g are the gaftric mufcles, which are beft feen here. 



e is narrow and long ; it pafles under and crofles f, one of it's, 

 infertions is at the lower line, the other is at the lateral, between 

 the fpiraculum and the neck, 



f is 



