The specimen £» much worn and Is apparent Xy somewhat fossil I *©&♦ The 
cal leas are not regularly rounded but frequently are of irregular po- 
lygonal outline. The greatest diameter of m average oalic© is 8.5 mi, 5 
lesser ? mm. Thickness of vail between the c&Xicee 2,5 sun. In one 
callce there wer# 21 large and 21 tmller septa, there may be four com- 
plete cycle® in some calico®, Th® columella is very large and vesicu- 
lar and occupies the greater part of the coraXlit® cavity. Dissepi- 
ments abundant, about IB to & ana,, they slope downward, and inward, 
quoted 
From reading the Pourtale® dose ripti on/ab ore , it will be evident that 
this is only & variety of 0, cavernosa with crowded calicos. The 
Explanaria rad lata of Eh rent erg is the ordinary Hoi last rasa c av® rn 0 aa 
as figured by &il&ew$dsr*ff<le and Haim®., excepting the fourth cycle of 
septa may not always\>a complete, 
Astraea endotheeata Duncan, The coralllt® wall® are thick, the 
last cycle of costae are small and thin, and there -appear t© be no 
septa corresponding to them, occasionally there is a rudimentary sep- 
tum of the fourth cycle, Th© last cycle of septum my have been 
broken off; or the wall, bsc&us© of subs© quant thickening, may have 
included their inner ends. Diameter of corallites from 8 to 10 mm. 
Type la the Geological Society of Loadonj duplicate in the 0, S. 
National Museum, The ©receding remarks are based on the latter, 
Ast rasa cylindrical Duncan is similar to 0. end ot he cat a , except 
it has smaller eorallitea* from 5 to $ mm, in diameter. Type Geologi- 
cal Society of London*, duplicate in the IU S, National Museum, A speci- 
men collected by Ur, Rob.t, T, Hill, Edge Cliff summit , Barbados, is in- 
termediate between j), ©n&othecata and jo^ ay 1 in dr lea . 
