Parasailia antiguensis sp. nov 
PI. figs. 
Corallum subturbinate , attached by a stout pedicel, calice 
subelliptical in outline, in type specimens somewhat constricted. 
Greater diameter of calice 29 mm*; lesser diameter 26 mm.; greater 
diameter of corallum in thickest portion 38 mm., lesser, 32 mm.; 
height of coralluia 26 mm, + (base damaged). Another specimen is 
nearly 30 mm. tall. 
Wall at oalioular edge only moderately thick, but very 
much thickened in the lower portion of the corallum. Costae tall, 
thin. Those corresponding to the first and second and one or two 
members of the third cycles of septa are very prominent, 1.5 to 3 
mm, high. They are slightly sinuous and lame inform, like project- 
ing plates. The margins appear entire and are obtuse or rounded. 
Between each pair of these most prominent costae is a les3 prominent 
one. There are besides these, small costae corresponding to the 
higher cycles of septa 
