244 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



PLATE 23 



Fig. 1. Bugula calif ornica Robertson. 



Fig. 2. Hincksina pallida (Hincks). Note large interzooecial avicu- 

 larium and outline of submerged ovicell. 



Fig. 3. fiw^u/a nm/ina (Linnaeus), ovicell. 



Fig. 4. Bugula pacifica Robertson, dorsal view. 



Fig. 5. Bugula minima (Waters), dorsal view. 



Fig. 6. Bugula mollis Harmer, dorsal view. 



Fig. 7. Bugula pugeti Robertson, vestigial ovicell and variation in 

 size of avicularia. 



Fig. 8. The same, dorsal view. 



