REPORT ON THE REEF-CORALS. 121 
2. Cycloseris tenuis (Dana). 
Fungia tenuis, Dana, Zoophytes, p. 290, pl. xviii. fig. 1. 
Oyeloseris tenuis, Moseley, Chall. Rep. Deep-Sea Corals, p. 190, pl. x. fig. 6. 
It is with extreme doubt that I have retained this species. I am of opinion that it is 
but the circular and normal form of Cycloseris (Diaseris) distorta, which name claims 
priority and should therefore be substituted for it. 
A large specimen was obtained, the longer diameter of which is about 6 cm. The 
species in its earliest stages is hexahedral, then dodecahedral, owing to the enlargement 
of the secondary septa; it is ultimately subcircular or slightly elliptical. 
Cycloseris hexagonalis, Milne-Edwards and Haime, appears to be identical with this 
species. 
Locality.—Samboangan, Philippines. 
3. Cycloseris cyclolites (Lamarck). 
Fungia cyclolites, Lamarck, Hist. Anim. sans Vert., ii. p. 236, 1816. 
Cycloseris cyclolites, Milne-Edwards and Haime, Cor., iii. p. 50, pl. D. 12, fig. 3. / 
A large, dead, and worn specimen was obtained, which does not appear to differ at all 
from this species. Though the dentation of the septa is destroyed, yet the characters of 
the lower surface are sufficient to fix the generic position of the specimen. It is by far 
the largest form of this species which has hitherto been obtained, being 10 cm. in the 
long axis and nearly 9 cm. in the short axis; it is about 4 cm. high. 
A small specimen of this species also was dredged off Santa Cruz Major Island, 
Samboangan, 10 fathoms. 
Locality. 
Samboangan, Philippines. 
4, Cycloseris freycineti (Milne-Edwards and Haime). 
Diaseris freycineti, Milne-Edwards and Haime, Cor., ili. p. 55. 
= os Semper, Zeitschr. f. wiss. Zool., Leipzig, xxii. pl. xxi. fig. i- 
Two circular specimens of this species were collected, which show no traces either of 
irregular growth or of injury. One is about 3 cm. in diameter and nearly 1 cm. high, 
evenly convex above and concave below; the other is smaller and nearly flat. The 
corallum is rather thin, with the edges rounded, being from about 4 to 5 mm. thick at 
the centre, and about 2 mm. thick at the margin. The axial cavity is very pronounced, 
rather deep and elongated; the four lateral, primary septa are very distinctly prominent 
at this part, and the columella is very developed, papillose and very even. The septa 
are of seven complete cycles, very low, evenly and closely placed, thick and nearly 
subequal in the larger cycles, very thin in the last cycle, evenly and vertically perforated 
and trellised, with abundant and very thick granules over the whole surface, the upper 
(ZOOL. CHALL. EXP.—PART XLvI.—1886.) Zz 16 
