, sp.nov. 
PI. , figs. 
1873. Ulophyllia macrogyra , Duncan, Quart. Jour, Geol. See. 
London, yol. xxix, p. 555. (not Roues , 
18 ) . 
189S. U lophy 1 lia macrogyra , Vaughan, Bull. Mus . Comp. Zool., 
yol. xxxiv, p. 229. 
Corallum composed of long, serpentine valleys, 5.5 to 11 
mm. in width, separated ^y very narrow simple walls. The type is 
a piece of a corallum, it is 75 non. tall, -34 mm. long an d 47 mm . 
wide; a perfect specimen probably would be quite large. 
The septa are thin, long, and crowded, they are thickened 
in the wall, and their inner portions are gradually swollen, the 
inner ends apparently are furnished with a small upright tooth. 
Number to the centimeter, about 18, usually equal in size along 
the straight portions of the valleys, in the curves at the ends 
of the valleys alternations of shorter and longer may be quite 
