134 THE VOYAGE OF H.M.8. CHALLENGER. 
and takes the form of minute granules or spinules below, becoming more or less striate 
in wavy lines, often thickened, which follow the dentation of the septa. Though 
apparently distinct, it seems likely that the three species are but extreme forms of one 
and the same species. 
Locality.—Tahiti. 
4. Fungia repanda, Dana. 
Fungia repanda, Dana, Zoophytes, p. 295, pl. xix. figs. 1, 2, 3. 
One specimen from Amboina has the septa quite thick, solid and strong, and not 
infrequently with a sharp somewhat trenchant edge. A series of specimens from Banda 
shows a very great variation, in which the septa become gradually thin, and, especially in 
the smaller specimen, quite fragile and delicate. A small specimen of this series presents 
marked differences in its delicate characters from the ordinary form of the Fungia 
repanda, but viewed in the series to which it belongs it is impossible to separate it. 
Localities —Amboina; Banda; Mactan Island, Philippines. 
5. Fungia confertifolia, Dana. 
Fungia confertifolia, Dana, Zoophytes, p. 297, pl. xix. fig. 5. 
Two specimens of this species were obtained. The extremely crowded, even, and 
undulate lamella are very characteristic; in young specimens where the lamelle are 
thinner, wider apart, and more unequal, the species very closely resembles the Fungia 
patella, but with age the septa become quite thick, with strong teeth, and the costal 
spines quite long and large. Distinctly raised tentacular teeth are present, but they 
are never strong and thickened as in Fungia dentigera. A very common characteristic, 
generally found on several parts of the specimen, is the unequal and suppressed nature of 
certain septa, resulting in the convergence and coalescence of the outer ends of the septa 
on each side. A moderately large, interesting variety from the Fiji Islands shows the 
septa much thickened, bearing rather large, blunt, irregular teeth. 
Localities.—Banda ; reefs, Fiji. 
6. Fungia horrida, Dana. 
Fungia horrida, Dana, Zoophytes, p. 298, pl. xix. fig. 7. 
Two specimens were obtained which, though differing in a few points from those 
deseribed by Dana, seem referable to this species. The costee are prominent, sub- 
lamellate and thick, deeply divided into long, often contorted and branched spines, 
which, in old specimens, become very crowded, irregular and thickened, and are often 
placed over the whole of the lower surface. The septa are thick, and very roughly 
