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HANDBOOK OF INVERTEBRATE ZOOLOGY. 



It will be remembered that this bar was formed by the 

 union of two processes which met and united in the me- 

 dian line. At this stage they separated again at this 

 point on the slightest pressure, and a specimen may occa- 

 sionally be found with quite a wide gap on the middle 

 line. 



Fig. 69. 

 Fig. 69. — Ventral view of an older larva. 

 W. K. Brooks.) 



Letters as in Fig. 68. 



(Drawn from nature by 



f. In from twenty-four to thirty-six hours more, the 

 halves of the bar (Fig. 67, e), are widely separated, and 

 are partially resorbed, and the posterior ends of the spic- 



k 



