FELICHTHYS 



10 



ft. Youn<r ijatt-topsnil about rcadv to hurst sliell, x 3.5. (Natural size of egg, 1S.5 mm). 



10. Youni,' witli tip-tilted tail shortly after being freed from the egg shell, x 1.75. (Nat- 



ural size of egg, 20 mm). 



11. Younjj in stage when "'skatinu:" over the bottom of the aquarium is the only method 



of progression, x 19. ( Natural size, 58 mm). 



12. Young in free-swimming stage with body walls completely closed over the ^olk, x .88. 



(Natural size, 98 mm). 



