256 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



PLATE 29 



Fig. 1. Colletosia bellula, new species. Note form of aperture and 

 lateral-oral pedunculate avicularia. 



Fig. 2. Colletosia radiata (Moll), the form innoininata (Couch). 



Fig. 2a. The same, interzooecial avicularium. 



Fig. 3. Reginella mucronata (Canu and Bassler), young zooecia at 

 margin of zoarium. 



Fig. 4. Puellina setosa (Waters). Note especially the minute bristle- 

 like avicularia opposite the aperture. 



Fig. 5. Eiir'ttina arctica new species. Details of skeleton, with base of 

 ovicell. 



Fig. 5a. The same, showing hyperstomial ovicell, larger aperture and 

 the attachment of the operculum. 



Fig. 6. Mo// za /i<3i£'//flrm (Moll), details of young zooecia. 



Fig. 7. Antropora tincta (Hastings). Area with vestigial avicularia. 



Fig. 8. The same, showing details of zooecium and avicularium and 

 variations in size and form of avicularia and vestigial 

 avicularian chambers. 



