REPORT ON THE REEF-CORALS. 147 
rudiments of a fifth occur; septa of the first and second cycles broad, prominent, and 
subequal, those of the fourth narrow, curving, and generally meeting those of the 
third at some distance from the abundant and spongy columella. 
This species recalls Dendrophyllia surcularis, Verrill, in many of its characters, but 
is easily distinguishable from it. The clump in the collection is about 12 em. high, and 
a little wider than its height. When viewed from above the specimen has much of the 
appearance of a colony of Astroites calycularis, owing to the extremely packed arrange- 
ment of the calicles, which rise to the same level and are often united, though never so 
much so as to give rise to a simple wall. 
Locality.—Australia. 
3. Dendrophyllia diaphana, Dana. 
Dendrophyllia diaphana, Dana, Zoophytes, p. 389, pl. xxx. fig. 3. 
A very small colony of this rather delicate species was obtained. 
Locality. Kandavu, Fiji. 
4, Dendrophyllia equiserialis (Milne-Edwards and Haime). 
Cenopsammia equiserialis, Milne-Edwards and Haime, Cor., iii. p. 129. 
A small and rather delicate specimen occurs in the collection. It differs from 
typical specimens of the species in that the septa of the third and fourth cycle are 
extremely narrow. 
Locality.—Samboangan, Philippines. 
Family MADREPORID. 
Genus Madrepora, Linneeus. 
Madrepora, Linneus, Syst. Nat., ed. x. p. 793. 
3 Dana, Zoophytes, p. 431. 
As Duncan, Rey. Madrep., p. 183. 
An extremely interesting new species (Madrepora mirabilis) in the collection 
presents a combination of characters hitherto unknown in the genus. While the greater 
number of apical calicles are of the ordinary type with twelve septa, others possess three 
cycles of septa, and these in a few calicles are all well developed (Pl. X. fig. 5a). This is 
certainly a most striking deviation from the normal condition in the genus; and if it 
had been common to all the apical calicles in the specimen of Madrepora mirabilis, it 
might have been regarded as a sufficient characteristic for generic separation. Consider- 
