Bi-Li.. U. vS. B. F., 1913. 



Tlatk II. 



Three myomeres isolated from the anterior part of the bodv, 1. e., the plane just in front of the anterior border 

 of the dorsal fin. The form of the myomeres and of the septa of the region is revealed. The longitudinal 

 extent of the single myomere is 9 cm., though the length of the longest muscle fibers is scant 7 mm. The 

 skeleton and its dorsal extension in the median septum are well' .shown. The protractor dorsalis and 

 its supporting tissues lying between the anterior dorsal fold and the median septum have iDcen removed. 

 Magnification ^. 



