590 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



PLATE 61 



Fig. 1. Holoporella hancock't new species, details of zooecia, ovicell, 

 avicularia, and giant interzooecial avicularium. 



Fig. 2. The same, reduced one-half, showing irregularities in form 

 and orientation of zooecia and side view of giant avicu- 

 larium. 



Fig. 3. Holoporella albirostris (Smitt), zooecia with ovicell and 

 high pointed avicularian umbo. 



Fig. 4. The same, a small umbonate process revealing the suboral 

 avicularium with dentate beak. 



Fig. 5. The same, giant interzooecial avicularium. 



Fig. 6. The same, young zooecium, showing form of aperture. 



Fig. 7. Holoporella tridenticulata (Busk), details of zooecia, es- 

 pecially the denticulate border of the aperture. 



Fig. 8. Holoporella peristomata new species, zooecia, ovicell and 

 large tubular extension of a peristome from a deeper layer. 



Fig. 9. The same, small avicularian umbo and flattened spines. 



Fig. 10. The same, small interzooecial avicularium. 



Fig. 11. The same, giant interzooecial avicularium. 



