Fia. 22. — Luminous gland o! C'ljpridina hilgendorfii {after Yatsu). 2, longitudinal section. 



4, transverse section. 



Fig. 2.3.— bmgle enlarged gland cell of Cypridina {ajter Dahlgren). P, nucleus and 

 plasmasome; C, cytoplasm; F, secretion fibrils; D, reservoir duct filled with lar^e yellow 

 tranuies; O, valve-like outer opening of cell at surface of body.t 



