Described by Matthai (1928), pages 263-268. 



Small boulders. Cups polygonal and irregular in 

 shape. Septa have 6-8 large teeth on their edges and 

 extend over the walls. Wall about 3 mm thick, cups 

 about 10 mm across, but may be much longer. Found 

 in the West Indies, Bahamas, Bermuda and the Florida 

 Keys. 



Jiemispherical, small, evenly convex, with broad 

 attachment on lower surface. Cerioid. Calices tend to 

 be polygonal. Mono-, and di-stomodoeal. TAonosto- 

 modoeal calices iO-i2 mm deep. Collines 2-4 mm 

 thick with faint groove or ridge on upper surface. 2 5- 

 30 septa in single corallites, 5-8 meeting the columella, 

 thicker ( i-i.5 mm) towards wall, narrow and almost 

 vertical edge. Margins with 6-8 coarse teeth, lower 

 ones larger, directed oblicjuely upwards. Sides of septa 

 rough. Septa meet in groove or continuous over ridge, 

 exsert to i.5 mm, exsert portion toothed. Columella 

 feeble, of loosely interlocking trabeculae. 

 48. Mycetophyllia lamarckana (Edwards and Haime), 

 (Plates 37, 38). 



Described by Matthai (1928) , pages 250, 255. 



Forms rather flat growths, either stalked or com- 

 pletely encrusting on old rock. Chocolate ground color, 

 but frequently overlain with bright green. Valleys 

 interconnected and walls tend to disappear in older 

 corals. Septa toothed. Two or three parallel vertical 

 toothed strips run lengthwise in the valleys. 



Sub-turbinate or encrusting, pedicelled or not. Val- 

 ley continuous, sinuous. Colline disappears partly in 

 older coralla. Valley i2-i5 mm wide, about io mm 

 deep. Colline 2-3 mm thick, sometimes up to 5 mm, 

 ridged or slightly grooved. Septa 8-iO per cm, 4 or 5 



97 



