Eocene Corals, Central New Guinea. A485 
Leprorra, Ed. & H., 1848. 
Leptoria carnei,! n.sp. (Pl. XIX, Figs. 2 and 3.) 
Diagnosis.—Corallum, external form unknown. Calicinal valleys 
long, and branching rather angular; they are irregularly arranged. 
Corallites, walls vary in thickness from a mere line which is no 
thicker than a dissepiment to that of the thickest part of the septa. 
Dissepiments most abundant nearest the walls. Septa, serration 
very slight ; all the septa in a considerable series are often equal in 
thickness. Septa become thicker distally and end in a cross-shaped 
T-piece, the length of which is from two to five times the thickness 
of the adjacent part of the septum. Columella irregular in thickness ; 
in places only as thick as the thinnest part of the septa; it may then 
be discontinuous, but it is usually a continuous lamina, and its 
thickness may be equal to the thickest part of the septa. 
Dimensions.—Length of calicinal valleys, 16-35 mm. ; breadth of calicinal 
valleys, 8-15 mm. ; septa, about 10 in 10 mm. 5 
Figures.—P\. XIX, Fig. 2, part of a polished surface (No. 6 type-specimen) 
showing the well-defined narrow wall with abundant adjacent dissepiments, 
and, opposite the arrow, the T-shaped ending of the septa and the thin, 
irregular columella; x 3 diam. Fig. 3, part of another specimen (No. 7 
co-type) showing (beside the two dots) the conspicuous wall; in the centre of 
the figure the expanded ends of the septa are cut through obliquely, and the 
columella is thin and discontinuous; the dissepiments are especially 
numerous; xX 3 diam. 
Affinities. —The equality of the septa at first suggests comparison 
of this species with the Mfeandrina equisepta, Gregory (1900, p. 212, 
pl. xix, fig. 2), from the Miocene of Christmas Island, but that coral 
has the columella of a true Meandrina (using the name Meandrina in 
the sense of Edwards & Haime, and not of its original founder, 
Lamarck). 
An Indian coral which was described by Duncan (1880, p. 39, 
_pl. vi, figs. 11, 12) as Diploria flecuosissima, D’Arch., is suspiciously 
like the species in its septal characteristics, but the Sind coral has 
the separated walis of Diploria. Duncan’s Meandrina medilicott: (1880, 
p. 77, pl. x, figs. 15, 16), from the Nari Series (Oligocene), is, 
however, not a Meandrina, but a Leptoria, as it has a very thin 
laminar columella; it differs from Z. carnei, which is its nearest ally, 
by its calicinal valleys being far more sinuous, its wall thicker, and 
the adjacent septa, though sometimes equal, usually being alternately 
large- and small; it has, moreover, about forty septa to the inch. 
L. concentrica, Duncan (1880, p. 87, pl. xxiii, figs. 1, 2), which 
ranges from the Khirthar or Nari Series to the Gaj, differs by having 
the septa alternately large and small, while the inner ends of the 
larger septa are club-shaped rather than T-shaped. J. radiata, 
Michelin (1847, p. 294, pl. Ixviii, fig. 3), from the Craie tuffeau 
(Turonian, Baines de Rennes), has long, straight calicinal valleys, 
which give the corallum its radiate aspect, and its septa are four to 
1mm. 
* Named after Mr. J. E. Carne, of Sydney, in recognition of his valuable 
additions to the geology of New Guinea, as well as of his many important con- 
tributions to that of Australia. 
