REPORT ON THE REEF-CORALS. 129 
columella is sometimes distinguishable. Septa generally eight or nine, very variable, 
oval or cuneate, and very roughly granulated, thick, often alternately united by the 
outer part, and thus enclosing the intervening ones. The surface between the cells is 
divided up into irregular, closely-placed, rounded or oval, septa-like lobes which give a 
peculiar appearance to the corallum. 
This species seems to be close to the Psammocora parvistella, Verrill; but the char- 
acters of the calicles and the intercalicular spaces will easily distinguish it. The speci- 
men is from about 9 to 10 em. high, and 10 to 11 em. wide. 
Locality.—Samboangan, Philippines. 
Genus 7. Stephanaria, Verrill. 
Stephanaria, Verrill, Trans. Connect. Acad., vol. i., 1868, p. 545. 
x Duncan, Rev. Madrep., p. 160. 
The essential distinction of this genus from Psammocora is to be found in the 
nature of the columella, which is papillary; but it is doubtful whether this character 
in these forms can be considered sufficient for generic separation. 
Stephanaria stellata, Verrill. 
Stephanaria stellata, Verrill, Trans, Connect. Acad., vol. i. p. 545, pl. ix. fig. 4. 
Two small specimens, apparently referable to this species, occur. They are interesting 
varieties, in which the branches are more elongated than in the Panama or Californian 
forms. (Reference to the distribution of this species is made under the genus Porites.) 
Localities.—Honolulu ; Kandavu, Fiji. 
Genus 8. Oxypora, Kent. 
Oxypora, Saville Kent, Proc. Zool. Soc. Lond., 1871, p. 283. 
This genus was proposed by Kent for the Trachypora of Verrill, the name 
Trachypora being already in use for a distinct genus of fossil Corals. Klunzinger has 
since proposed Echinophylhia for the same genus, but Oxypora claims priority. By a 
slip, this genus has been placed as a synonym of Phyllastrea by Professor Duncan, 
while 7’rachypora is retained. 
Oxypora contorta, n. sp. (Pl. V. figs. 2-2b). 
Corallum large, explanate, suberect and foliate, thin, very contorted, the twisted 
parts uniting to form large, hollow tubes, which in course of growth become closed 
above; pierced with irregular openings, which become larger and more numerous 
towards the margin. The under surface roughly and irregularly costate, the coste 
being unequal, shghtly thickened, a little prominent, and finely but strongly spinose, 
(ZOOL, CHALL. EXP.—PART XLVI.—1886). Zz 17 
