margins, with smaller septa alternating. Found in 

 Florida and the West Indies. 



TAassive, heavy, flat, convex or irregular. 'Discon- 

 tinuous valleySf long and sinuous, 8-14 mm wide, aver- 

 age a mm, 6-iO mm deep, average 8 mm. Rarely 

 short valleys. Colline, with groove up to 4 mm wide, 

 average depth i.5 mm, up to 5 mm, rarely discontin- 

 uous. Principal septa 6.8 per cm, 1.2 mm thick, 4.5 

 mm deep. Margins of septa vertical, entire with gran- 

 ules on sides. Smaller narrow septa alternate. Septa 

 exsert i to 1.5 mm, exsert ends arched. Columella 

 lamellar, sometimes of twisted solid trabeculae or two 

 or three parallel lamellae, continuous. Sometimes rudi- 

 mentary or discontinuous. 



41. !Meandrina brasiliensis (Edwards and Haime) . 

 Also Vectinia brasiliensis, (Matthai 1928). 

 Described by Matthai (1928), pages 167-169. 

 Smaller than 7A. meandrites. Flat or rounded on top, 



conical below with short stalk. Valleys interconnect 

 usually with side valleys opening off a single length- 

 wise central valley. OtherwibC smilar to 7A. Meand- 

 rites. Not very common. Brazil, Florida reef and the 

 West Indies. 



turbinate, somewhat convex, short peduncle. Con- 

 tinuous valley with midlongtitudinal and paired lateral 

 lobes as In Manicina areolata, w''dth 15-20 mm. Colline 

 somewhat thickened with groove about 2 mm wide, or 

 ridged, about 2 mm thick. 



42. Dichocoenia stokesii, Edwards and Haime, 

 (Plate 31). 



Described by Matthai (1928), pages 198-201. 

 Forms heavy boulders up to one foot in diameter. 

 Short valleys, separate from each other, walls project- 



93 



