100 K. KISHIXOUYE. 



the lateral eye. 2D. 

 Fig. 61. Lateral portion of a transverse section of an embryo, a little before the 



stage of fig. 15, through the lateral eye. 2D. 

 Fig, G2. Transverse section of the lateral eye of an embryo, shown in fig. 17. 



2D. 

 Fig. G3. Two consecutive transverse sections of the anterior end of the lateral 



eye. 4B. 

 Fig. G4. Transverse section of tlie lateral eye of an embryo of the trilobite stage. 



2D. 

 Fig. Go.. Cross section of three ommatidia of the lateral eye of an embryo of the 



trilobite stage. 2F. 

 Fig. GG. Longitudinal section of the same. 2F. 

 Fi». G7. Longitudinal section of the median eye of an embryo, at about the stage 



offig. 5G. 2D. 

 Fio-. G8. Portion of a longitudinal section of an embryo, sliown in fig. 15. 2C. 

 Fic^. GO. Diagrammatic representations of tlie anterior portion of tlie nervous 



system of an embryo of the tri]ol)ite stage, a. Frontal view. b. Side 



view of the right half. 



