A. EF. Verrill— The Bermuda Islands; Coral Reefs. 285 
The disk is ocher-yellow or light orange-yellow, with the central 
part darker or more brownish, with radial white lines or rows of 
spots, and usually a circle of small flake-white spots around the 
mouth. Tentacles similar to the disk, but usually paler, often 
specked with white at the tips, and frequently with white specks 
between their bases. But the color may vary in the same colony, 
some of the polyps being without white lips and radii on the disk 
and spots on the tentacles, while others will have them. 
The anatomy has been described by MeMurrich, Duerden, and 
others. The internal structure seems to vary considerably in vari- 
ous features. 
It is common throughout the West Indies. 
SS OOD 
=F IWS 
Figure 130.—a, Palythoa mammiliosa, expanded polyp; 06, P. grandiflora, 
expanded polyp. Both about 14 natural size, by the author. 
Palythoa grandiflora Verrill. Figures 130, 6, 131, 182. Plate xxx, fig. 1, b. 
Palythoa grandiflora Ver., Trans. Conn. Acad. Sci., x, p. 564, pl. Ixviii, fig. 
6, 1900; op. cit., vol. xi, p. 52, pl. vii, fig. 2, 1901. 
Corticifera ocellata MeMurrich, Proc, Acad. Nat. Sci., Philad., 1889, p. 120 ; 
reprint in Heilprin’s The Bermuda Is. (non Ellis and Solander sp.). 
This is one of the largest known species of Zoanthide. When full 
grown it forms broad but not very thick crusts, several feet broad, 
but more frequently it is found in smaller colonies, a foot or less in 
breadth. In contraction the large polyps cannot contract entirely 
to the level of the ceenenchyma, but their summits remain as promi- 
nent rounded tubercles or mammille, 10 to 14™™ broad, on its sur- 
face (fig. 131). In this state the summits of the contracted polyps 
are sulcated with about 26 to 30 grooves, terminating in white, 
angular points around the disk. In expansion the polyps rise con- 
siderably above the cenenchyma (about 15 to 20™™), and swell out 
at the summit into broad cup-shaped or flower-like forms, often 
with the disk flat or even convex, and so broad that their margins 
often overlap each other in the clusters, entirely concealing their 
Trans. Conn. Acap., Vou. XII. 19 JunE, 1906. 
