Goniastrea variabilis Duncan 
PI* fig. /'•; 2. ^Ujos^lci 
1873. Goniastraea variabilis , Duncan, Quart, Jour, Geol, Soc. 
London, Vol. XXIX, p. 557, PI, XXI, fig. 11. 
1899. Goniastraea variabilis , Vaughan, Bull. Mus. Coiap. £ool., 
Vol. XXXIV, p» 229. 
Duncan*3 original description; 
"The ccrallum is massive, ovoid and depressed in shape; 
and the corallites radiate from a small base. 
The upper surface is slightly convex, mid is crowded with 
calices of different sizes, and all more or less angular in out- 
line • 
The walls are thin, united, and slightly wavy. 
The fossae are shallow; and the columella differ greatly in 
their development. Usually they are spongy and well developed; 
sometimes they are distinctly linear, and formed by one lamella; 
