242 EARLY STAGES OF ARTHROPOD AND VERTEBRATE EMBRYOS. 



Fig. 149. — Same, stage L, seen from the haemal surface, showing the completion of the sixth thoracic and all 

 the abdominal segments. Five great masses of fiber cells, surround the heemo-neural muscles ft. «. m. ^~^, that 

 divide the thoracic yolk mass into five lateral lobes. 



Fig. 150. — Same, stage M. Two great masses of fiber cells av., and the remnants of the hsemal blastoderm, are seen 



on either side of the cephalic navel, c.nv. 



