Plate 26 



I'h.-. 1,2. I'i tralu lla fnlrifi ni, new species (p. 263). 



1. Zooecia, 2(1, with the characteristic falciform avicularium. 



2. Inferior side of the same, X 20. The perforated areas are closed by 



a membranous pellicle; their size is variable. 

 D. 5151. Sirun Island. 



3. Petraliella robusta, new species (p. 260). 



Zooecia, X20, exhibiting the bifid robust avicularian umbo. 

 D. 5162. Tinagta Island. 

 4-8. Petraliella verrucosa, new species (p. 263). 



4. Surface of ovicelled specimen, ■ 10. 



5. Zooecia of Figure 4, X20. 



I). 5162. Tinagta Island. 



6. More common aspect of the zooecia, X20. 



7. An example, > 20, with avicularia little salient. 



1). 5574. Simaluc Island. 

 S. An ovicelled specimen, X20, with salient avicularia. 



D. 5478. Tacbuc Point, Leyte. 

 9. Coleopora verrucosa Canu and Bassler, 1927 (p. 267). (See also pi. 

 20, fig. 4.) 



Z 'cia, 20, incrusting a shell. 



1). ->\:\1. Jolo Light, Jolo. 



(593) 



