ON THE STRUCTURE OE HYDRACTINIA ECHINATA. 09 



denu of the "neck." Food is being digc&ted by tiic endoderm cells of the 

 " iicad." D. 3 cam. 



Fig. 7. — Transverse section through a blastostyle showing an egg-cell, 

 e", in the niesogloca of the blastostyle, and four egg-cells in the endoderm of 

 the sporosac. D. o cam. 



Fig. 8. — Longitudinal section of a dactylozooid, showing food granules in 

 the endoderm of the upper part. D. 3 cam. 



Fig. 9. — Longitudinal section of the endoderm of gasterozooid. D. 3 cam. 



