Plate 25 



Figs. 1,2. Petraliella armata Waters, 1913 (p. 260). 



1. Zooecia, X20, of the unilamellar zoarium. 



2. Inferior side, X20, with radicular pores. 



D. 5149. Sirun Island. 

 3-11. Petraliella philippinensis, new species (p. 261). 



3. The unilamellar zoarium, X20, with zooecia ornamented by large 



avicularia and small avicularian umbo. 



4. Broad zooecia, X20, showing the proximal border of the aperture. 



D. 5162. Tinagta Island. 



5. Zooecia, X20, with large oblique avicularium. 



D. 5147. Sulade Island. 



6. Zooecia, X20, with large avicularian umbo. 



7. An example, X20, showing the hollow structure of the avicularian 



umbo. 



D. 5144. Jolo Light, Jolo. 



8. Inferior side of Figure 3, X20. 



9. Inferior side of Figure 4, X20. 



D. 5162. Tinagta Island. 



10. Inferior side of Figure 6, X20. 



11. Inferior side of Figure 7, X20. 



D. 5144. Jolo Light, Jolo. 

 (592; 



