Plate 19 



Figs. 1 4. Exechonella magna MacGilHvray, 1895 (p. 121). 

 1. Surface of the incrusting zoarium, X10. 

 '_'. Several zooecia of the same, X30. 



3. Edge view of zooecia, X20, showing their great depth. 

 I. Microstructure of the frontal, X85, which is very different from the 

 ordinary tremoeyst. The pores do not serve for passage by the 

 mesenchymatous fibers. 

 D. 5137. Jolo Light, Jolo. 

 5-8. Coleopora erinacea, new species (p. 268). 



5. Zooecia, X 20, incrusting a Nullipore and showing the spinose frontal. 



Two zooecia show the primitive internal peristome. 

 G. A similar fragment, X 10, showing the ancestrula. 



D. 5137. Jolo Light, Jolo. 

 7. Several zooecia, X20 of a dead specimen without frontal spicules on 



the tremopores. 

 S. Microscopic structure of the frontal, X85. 

 D. 5147. Sulade Island. 

 9-12. Coleopora scriata, new species (p. 270). 



'.). Zoarium, 10, incrusting a Nullipore. The zooecia! peristomes are 

 very long. 



10. Triserial specimen with short peristomes, X10. 



11. A biserial branch, X20. Variation with small lacunae in the form of 



i remopores. 



12. Microstructure of the frontal, X85. 



1). 5137. Jolo bight, Jolo. 



(586) 



