382 University of California Publications in Zoology. [Vol.4 



Fig. 32. — Ventral view of Ceratium californiense showing regenerative 

 growth at the distal end of the apical and proximal ends of the antapical 

 horns. Points of junction of new and old growth marked by an asterisk. 

 X 300. 



Fig. 33.— Dorsal view of the same. X 300. 



