PLATE III. 



Figs. XXIX, XXX, XXXI. Transverse sections of the head of an advanced 

 embryo They are from the same series as figures XXYII, XXVIII. 



Fig. XXXII. A transverse section of the same series as the preceeding, 

 through the posterior part of sub-cesophageal ganglion (No. II). 



Fig. XXXIII. Transverse section of head of Chrysopa showing relation of 

 last abdominal somite to preceeding abdominal somites. 



Fig. XXXV. Transverse section of egg of Meloe showing formation of blasto- 

 derm. 



Fig. XXXV. Structure of blastoderm. 



Fig. XXXVI. Transverse section of the egg showing origin of inner layer 

 from median groove (BH), and amniotic folds (AMF). 



Fig. XXXVII. Transverse section of a more advanced embryo of Meloe. 

 The amniotic folds have united and the embryo has consequently been separated 

 from the surface. 



Fig. XXXVlIi. Transverse section of embryo at same stage but through 

 a different region. 



Fig. XXXIX Transverse section of more advanced embryo of Meloe in which 

 inner "layer (I) has been constricted off. 



Fig. XL. Transverse section of advanced embryo ot Meloe. The nervous 

 system (NS) has been separated from the surface. 



Fig. XI, 1 Transverse section of egg of Mantis showing embryonic area E. 



