180 MADREPORAEIA. 



G. Philippines 2. Septa as thin twisted threads. 



G. Paris Basin H. Walls membranous, but with very few perforations. 



G. Coutances 1. Se]ita run out into long spines. 



Goniopora xe. Or under S. 



Goniopora xc. With septa as sharp hair-like points. 



8. Walls with trabeculse otherwise specialised. 



G. Great Barrier Beef 4. The tips of the trabeculre as stout granules. 

 G. Great Barrier Beef 8. As the liighest parts of irregular septa. 

 G. North- West Australia 1. 

 Doulitful :— 



G. Great Barrier Beef 5. 

 ' Goniopora xe. 



C. Calicles like deep, neatly cylindrical punctures in the otherwise smootli surface, usually 

 with septa obscured, and instead, 6 prominent paliform plates. Only found in globular and 

 massive growths. The genus Bhodarcea of authors. 



G. Solomon Islaiuls 'J. 

 G. Great Barrier Beef 3. 

 G. Great Barrier Beef 3. 

 G. Celebes 1. 

 G. Philipp)ines 2. 

 G. China Sea 4- 

 ♦Doubtful :— 

 G. Australia a. 

 G. Great Barrier Beef 3. 

 G. Philippines 3. The small size renders the calicles funnel-shaped. 



D. Calicles are deep, irregular openings in twisted bundles of vertical laminfe, the radial 

 symmetry being more or less obscured. They are only found on the tops of colonies which 

 show the expanding sheaf growth-form, see p. 26, and Diagram D, p. 24. The primitive type 

 of calicle always appears on the sides. 



G. Singapore 3. 

 G. Maldives S. 

 G. Mcddivcs 3. 

 G. Bed Sea 1. 



G. Bed Sea 2. With spiny septa. 

 G. Bed Sea 3. 



G. Bed Sea If.. Calicles highly specialised, and approaching B (6) 7 or h. 

 G. Bed Sea 6. 

 Doubtful :— 



G. Queen Charlotte Islands 1. 



* This type of calicle is also seen in the coral referred to in the Appendix to the English 

 GonioporcE, p. 153. 



