A. EF. Verrill—The Bermuda Islands; Coral Reefs. 229 
The mature calicles are mostly 15 to 20™™ wide, rather deep, with 
the sides abrupt, owing to the width of the upper part of the septa. 
Some of them, in the larger specimens, may be distinctly and some- 
times regularly 4- to 6-lobed, with a stellate effect; many are circum- 
scribed, but most are lobed or sinuous. The collines are mostly 
simple, thick, and nearly solid below the surface, but usually appear 
double at the summit, with a median line or furrow, across which 
the septa do not often blend. It is a rare species; the type speci- 
mens were obtained from the reefs in Great Sound, off Hamilton, 
and off Ireland Island, by A. H. Verrill, 1901. The expanded polyps 
were not observed. 
At present it is only known from Bermuda, with certainty. 
Mussa (Isophyllia) multiflora Ver. Small Rose Coral. Figure 84. 
Isophyllia multiflora Verrill, these Trans., xi, p. 125, pl. xx, fig. 1 (not pl. 
ROGveies 1 OO1e 
Isophyllia multilamella Pourtalés, Florida Reef Corals, p. 70, 1871 (non Duch. 
and Mich. sp.). 
? Isophyllia marginata Quelch, op. cit., p. 85, 1886 (non Duch. and Mich.). 
This is also a rather uncommon species, at least on the inner reefs. 
It is distinguished mainly by the small shallow calicles, thin, narrow, 
crowded septa, with long and slender denticulations, which are 
roughly spinulose, about 10 to 12 on the larger septa ; distal ones 
shorter and divergent at the slightly exsert convex summits of the 
septa. It most resembles MW. fragilis, var. strigosa. 'The latter has 
larger and deeper calicles with wider septa, which are less crowded. 
The polyps when expanded form beautiful crowded clusters, simi- 
lar to those of M. fragilis, but smaller. The predominant colors 
are emerald-green, lavender, and flake-white. It occurred on the 
serpuline atolls, off Hungry Bay ; also on the reefs off Great Sound, 
and in other places, but it is not common. Florida Reefs,—Pour- 
talés. 
When I first described the species I erroneously referred to it a 
young specimen of MW. rosula, which is quite distinct in structure. 
Mussa rosula Verrill, sp. nov. Little Rose Coral. Figure 83. 
Mussa multiflora (pars) Verrill, Trans. Conn. Acad., xi, p. 126 (No. 4009), 
pl. xxv, fig. 1, 1901. (Young.) 
Isophyllia rigida (pars) Verrill, Bull. Mus. Comp. Zool., i, p. 50, 1864 (non 
Dana, non Pourtalés, nec Quelch). 
This is a rare and but little known species of which I have only 
recently obtained a mature specimen, through the young have been 
