SOME POINTS IN DEVELOPMENT OF SOOEPIO FULVIPES. 597 



Fig. 12. — Transverse section of body of same embryo, x •^. 



Fig. 13. — Transverse section of body of an older embryo, x -^ . 



Fig. 14. — Transverse section through head of same embryo, showing mode 

 of nutrition, x -^^. 



Fig. 15. — View of ventral surface of advanced embryo. The iii to vi 

 appendages have been removed on the left side. X f. 



Fig. 16. — View of mouth parts of same embryo, from the front, x f . 



Fig. 17. — View of mouth and surrounding appendages of same embryo. 

 The left chelicera has been unfolded to show its structure, and the left chela 

 has been removed, x ^. 



Fig. 18. — Section through retina of central eye. x ■^^. 



