Ieastrea confusa Dim can 
PI. fig# 
1867. Isastraea confusa , Duncan, Quart . Jour, Gaol, Soc, London, 
Vol. XXIV, pp. 14, 24, PI. II, fig. 6. 
Original description: 
"The corallum is short, and covers much space. The coral- 
lites are very irregular in size, and the calices also. The 
fossa is moderately deep, and presents a false columella. The 
septa are thick, and unite laterally in sets of three , four, or 
six. The free margin is faintly dentate. The largest calices 
have four cycles of septa in six systems; hut usually only three 
cycles are found in smaller calices. The diameter of the calices 
is from l/lQ to 4/l0 inch. 
Locality . St* Croix, Trinidad. tt 
