Eocene Oorals, Central New Guinea. 483 
section on the same specimen shows a strong resemblance to the 
figure by Reis (1890, p. 108, pl. iv, fig. 17) of his Desmopsammia 
perlonga, for it has broken thin irregular septa, on which occur 
triangular paliform expansions. The section is, however, probably 
across a young Circophyllia in which the septa are thin and incomplete, 
and the columella is represented only by isolated trabecule from the 
septa. 
\ 
SrytopHora, Schweigger, 1819. 
Stylophora papuensis, n.sp. (Pl. XX, Fig. 3.) 
Diagnosis.—Corallum compact and formed of tufts of crowded 
branches which are circular in transverse section except near their 
bifurcations, where they give rise to elongated or dumb-bell sections. 
The branches are usually hollow. Surface granular and punctate. 
Corallites small and rounded. Calices arranged irregularly and 
sparsely, their distance apart being generally greater than the 
diameter of the corallites. They are shallow and their margins are 
flush with the surface of the corallum and show no sign of a raised 
rim. Septa six in number and regular in arrangement; they are 
thick and joined to the columella. No secondary septa. Columella 
prominent. 
Dimensions.—Corallum, 45 long, 60 broad, 30mm. thick; diameter of 
branches, 3-4mm.; diameter of corallites, -6mm.; distance of calicinali 
centres, 1-2 mm. 
Figures.—P1. XX, Fig. 3, part of surface of corallum, x13 diam. 
A finities.—S. papuensis show a close resemblance to the Eocene 
‘species S. rugosa (d’Arch.),! agreeing with the latter in the size and 
irregular arrangement of the calices, in the prominent columella, and 
the granular surface. It differs, however, by having neither 
secondary septa nor rim around the calices. 
Stylophora has a wide range through the Kainozoic limestones of 
Sind. Duncan has thence described four species. Of these S. contorta, 
Leym., from the Khirthar Series (Duncan, 1880, p. 61, pl. xviil, 
figs. 21, 22) is widely distributed through the Eocene; it is dis- 
tinguished from S. papuensis by having more crowded and larger calices 
and conspicuous secondary septa. ‘lhe nearest Indian species is the 
S. pulcherrima, Ach., which has been described from Sind by Duncan 
(1880, p. 73, pl. xv, figs. 12, 13) in the Nari Series, which he 
correlated with the Oligocene or Upper Eocene. The Sind representa- 
tive of the species agrees with S. papuensis by having a granular 
surface and only six septa; but in S. pulcherrima the corallum is 
flat and massive instead of being dendroid. Of the two Miocene 
species from Sind, S. mznuta, Duncan (1880, p. 83, pl. xxii, fig. 6, 
originally described by Duncan from the West Indies) has a smooth 
surface and more distant calices, each of which is surrounded by 
a thick circular rim; while S. confusa, Duncan (1880, p. 83, pl. xxiii, 
fig. 7) has crowded calices, a nodular corallum, and the inter- 
calicinal distance is only about 1 mm. 
1 D’Archiac, 1847, p. 1010; 1850, p. 403, pl. viii, fig. 7. 
