SQ K. KISHINOUYË. 



Fig. 12. A portion of a section of an egg in the stage of Fig. 

 6. {Lycosa). 2 C. 



Fig. 13. A section of the secondary thickening. (Lncosa). 2D. 



Fig. 14. A portion of an section of an egg, a little more ad- 

 vanced than the egg in the stage of Fig. 12. (Lijcosa). 2 C. 



Fig. 15. A section of an egg after segmentation showing 

 the absence of the nucleus in the yolk and a number of small yolk 

 balls. (Liicosa). 2 B. 



Fig. 16. A longitudinal section of an egg of the protozonite 

 .stage. {Agalrita). 2 B. 



Fig. 17. A ))ortion of a cross section of an egg of the proto- 

 zonite stage. (^Agak'Nu). 2 1). 



Fig. 18. A cross section of an egg showing the separation of 

 the mesoderjn into two lateral halves, the formation of the cœlomic 

 cavity, and the appearance of the appendage, in the thoracic region. 

 The mesoderm of the cephalic region is not yet divided. (Ai/alcfia). 

 2 B. 



Fig. 19. The median longitudinal section of the embryo in 

 the reversion stage. ÇAgalenci). 2 B. 



Fig. 20. A diagram of the ventral [)late (imagined as unrolled) 

 of an embryo in the stage of the maximum dorsal tiexare. 



Fig. 21. A diagram of the ventral [»late (imagined as unrolled) 

 of an embryo in the stage of reversion. 



Fiof. 22. A lonofitudinaJ section of an e^s^ in the staue of Fiy-. 

 20, showing the appendages and cœlomic cavities. (Agalenay 2 B. 



Fio;. 28. A cross section of an eora- in the same stage as of the 

 previous figure, showing the semicircular groove, the lateral vesick', 

 the continuous mesoderm of the head, and the cœlomic cavities and 

 thoracic ganglia. (Agalena). 2 B. 



Figs. 24, 2t5. Fortions of median longitudinal sections, showing 



