MORPHOLOGY OF CRAXIAL MUSCLES IX SOME VERTEBRATES. 225 



Text-fig. 51. 



ttvAiv. 



'^'V.cail 



Khio.S^.hv..,V 



ct^fv .ccel 



52. 



Test-figs. 51 aud 52.— Xecturus. embryo 12 mm. Text-fig. 51 

 i.s the more anterior. 



