Plate 57 



Figs. 1-3. Psilopsella uniseriata Canu and Bassler, 1927 (p. 405). 



1. Colony, X10, showing the irregular budding and the presence of pari- 



etal dietellae as well as the row of areolar pores around the smooth 

 frontal. 



2. Zooecium of the same incrusting uniserial zoarium, X20. 



3. Interior of zooecium, X20, showing the orbicular aperture. 



D. 5217. Anima Sola Island. 

 4-7. Crepidacantha grandis, new species (p. 411). 



4. Incrusting ovicelled specimen, X20, The setiform spines are broken. 



5. An example, X20, showing the parietal dietellae. 



6. Zoarium, X20, in which the zooecia are ornamented with their seti- 



form spines and with the long flagellum of the vibracula. 



7. Microscopic structure of the frontal, X85. 



D. 5217. Anima Sola Island. 



8. Crepidacantha papulifera, new species (p. 410). 



Zooecia, X20, of the incrusting zoarium showing the characteristic 

 frontal pustule. 



D. 5145. Jolo Light, Jolo. 



9. Crepidacantha altirostris, new species (p. 411). 



Ovicelled and ordinary zooecia, X20. The high position of the avicu- 

 laria is evident. 



D. 5179. Romblon Light, Romblon. 



(624) 



