ing fiom general surface. Septa thick, without teeth. 

 Found on Florida reefs, in the Bahamas and in the West 

 Indies. 



Convex or rounded, heavy. T^arrow, short discon- 

 tinuous valleys. Mono-, di-, and tri-stomodoeal polyps. 

 Intramural budding. Valleys slightly curved, up to 

 2 8 mm long, 3-5 mm wide, 4-5 mm deep, lateral 

 branches or terminal forks rare. Walls vary in amount 

 of projection, up to i mm. Walls i to i.5 mm thick, 

 and up to 5 mm apart towards edge of corallum. Veri- 

 theca granular or vesicular. Septa alternately thick 

 and thin, about io of each per cm. Jhick septa about 

 0.75 mm towards wall. 5-8 thin septa and all thick 

 septa meet columella. 7hick septa exsert to i mm, 

 lower broadened parts sometimes form paliform lobes. 

 Columella of closely twisted iraheculae, i mm broad. 

 Costae correspond to septa, but thicker, with granular 

 edges. 

 43. Dendrogyra cylindrus Ehrenberg, (Plates 32, 33). 



Described by Matthai (1928), page 170. 



Forms heavy pillars up to 2 feet long, wide at base. 

 Winding, narrow valleys, not all interconnected. Thick 

 septa without teeth. Narrow walls between valleys. 

 Found on the Florida reef, in the Bahamas and in the 

 West Indies. 



yieavy, massive, rising into cylindrical branches 

 which may reach 60 cms in length, with a broad base 

 up to 20 cms in diameter. Sinuous, discontinuous val- 

 leys, often short, 3-4 mm wide, 2.5-3 mm deep. Collines 

 average 3 mm thick, up to 5 mm, usually with shallow 

 groove. Septa non-dentate, sides granular, alternately 

 thick and thin, 7-iO per cm. 7hick septa, i mm thick, 

 meet columella, exsert up to i.2 5 mm. Exsert portion 



94 



