HEAD OF BLA TTA. 

 du labre ou sorr 



o i.e somite post-antennaire ou soini 



7° Le somite mandibulaire ou sonii 



8° Le somite maxillaire ou sotni 



9° Le somite labial ou sonii 



From the embryological view !)oiut J;uk 

 these conclusions in the development of the s 

 system. He considers " the nervous system 

 (or the unpaired sympathetic system) as hei 

 phological prolongation on the ectoderm ie st 

 tion, of the chain of the central system. " 

 of this view has been pointed out by HeynK 

 devoted especial attention to the study of t 

 the sympathetic system, and whose argument 

 especial weight. 



Of the work of Patten, Wheeler, Viallane.^ 

 excellent resume by Comstock and Kochi lea\ 

 These last writers accept Folsom's conclusion 

 of seven primitive segments, and agree with hii 

 ages of the superlingual segment ma}' be r 

 Orthoptera by a pair of small sclerites lying 

 within the mouth cavit}-. Neither lle\inoi 

 accept this view. As regards the eondition ii 



Anurida, and his 

 of other Colleml)( 

 such a fundament 



