REPORT ON THE REEF-CORAILS. (il 
' 
this species. The clavate or cylindrical lobes are much less than two inches thick, some- 
times being scarcely one inch. The species in its earliest form grows in an incrusting 
manner with short calicles. 
Locality.—Samboangan, Philippines. 
2. Galaxea explanata, n. sp. (Pl. IV. figs. 6—-6d). 
Corallum a large, spreading, rather thin, explanate mass formed by an abundant 
peritheca, with an even, undulate, upper surface in which the cells are very large, loose, and 
delicate. Calicles, subcireular, angular or polygonal according to the prominence of the 
larger coste, small, uniformly from 3 to 4 mm. in diameter at the margin of the wall, 
rather scattered, about 5 to 8 mm. apart, cylindrical and subparallel, projecting about 5 
to 8 mm. above the peritheca. Walls rather thin; coste remote, thickened and 
prominent with sharp edges throughout the length of the calicles, those of the first cycle 
very prominent, those of the second less so, and those of the third cycle generally absent 
or very imperfectly developed. Septa very granulated, of two cycles complete, a third 
very small and often incomplete ; those of the first cycle rather thick, exsert, projecting 
about 2 or 3 mm., those of the second much smaller and thinner and often unequal. 
This form differs markedly from all the other known species of the genus. Its mode 
of growth is altogether unique. 
Locality.—Levuka. 
3. Galaxew musicalis (Esper). 
Madrepora musicalis, Esper, Pilanz., i. p. 160; Madrep., pl. xxx. 
Galaxea musicalis, Milne-Edwards and Haime, Cor., ii. p. 225. 
A single rather large specimen of this species was collected. The coste in many 
calicles are quite inconspicuous, the wall appearing smooth. 
Locality.— Somerset, Cape York ; 5 fathoms. 
4. Galaxea fascicularis (Linnzeus). 
Madrepora fascicularis, Linnzus, Syst. Nat., edit. xu. p. 1278. 
6 Ellis and Solander, Zoophytes, p. 151, pl. xxx. 
Galant Jascicularts, Milne-Edwards and Haime, Cor., ii. p. 227. 
A single small specimen of this well-marked species occurs in the collection. It 
consists in great part of a dead corallum, which has been more or less covered by fresh 
growth, the calicles of which are mostly very small. 
Locality.—Kandavu, Fiji. 
