Plate 17 



Figs. 1,2. Thalamoporella lioticha Ortman, 1890 (p. 150). 



1. Cylindrical, ovicelled zoarium, '20. 



2. Unilamellar fragment, -,20. 



D. 5151. Sirun Island. 



3. Thalamoporella granulata Levinsen, 190!) (p. 150). 



An incrusting specimen, X 20, referred to this species. (Seealso pi. 1G, 

 fig. 6.) 



D. 5151. Sirun Island. 



4. Thalamoporella? insolita, new species (p. 154). 

 The free, cylindrical zoarium, X20. 



D. 5574. Simalac Island. 



5. Thalamoporella cxpansa Levinsen, 1000 (p. 153). 

 Zooecia, X20, of example incrusting a Nullipore. 



D. 5137. Jolo Light, Jolo. 

 9. Monoporella fimbriata Canu and Bassler, 1927 (p. 156). 



('). Zooecia, X20, incrusting a shell fragment. The ancestrula and the 

 ancestrular zooecia are surrounded by a calcareous epitheca. 



7. A group of ovicelled zooecia, X20. The ovicell is buried in the distal 



zooeciuni and its edges are costulated and fringed. 

 D. 5151 . Sirun Island. 



8. Ovicelled zoarium, X20, provided with ectocysl and operculum. 



The gray spots indicate the attachment of the opercular muscles. 

 Spines are rare. 



9. Fragment of the ectocyst, X85. 



D. 51 17. Sulade Island. 



10. Monoporella fimbriata crassa, new variety (p. 157). 

 Incrusting, ovicelled zooecia, X20. 



1). 5137. Jolo Light, Jolo. 



11. Monoporella fimbriata carinifera, new variety (p. 157). 

 Zooecia, • 20, showing the prominent carina. 



I). 1137. Jolo Light, Jolo. 

 (584) 



