ON THE DEVELOPMENT OF LTNGULA ANATINA. 



73 



pairs are the larval muscles, which degenerate in the course of 

 development. The obliquus cxtemus {obi. ext.) appears at a stage 

 a little older than that of the Wood-cut A (PI. VI., Fig. 82). 



ni. br. tr. .. 



ni. vt 



m. br. tr.„_„jf@; 



m. vt J 



L—lat. 



A. 



Musculature seen from tbe left side. 



A. 5-6 p. c. stage. 



B. 7-9 p. c. stage. 



The occlusores anteriores (PI. VI., Figs. 81, 82, Wood-cut A, 

 occ. ant.) are'composed of a few bundles of muscle fibres, situated 

 at the anterior corners of the body cavity close by the anterior 



