THE MUSCLES ; THE FAT-BODY AND CCELOM. 



73 



mented sheet, covering the ventral surface between the fore- 

 edge of the second abdominal sternum and the fore-edge of the 

 seventh. These muscles, in conjunction with the longitudinal 

 tergal muscles, tend to telescope the segments. 



Head muscles- 



Add, of coxa 



Abd. of coxa --A- 



Ext. fern. ... 

 1st tergo-st. 



Long, stern. 



Obi. sternal 



Tergo-stern. 



Fig. 34. Muscles of Ventral Wall, with the Nerve-cord. X 5. 



