202 
present specimens to the Museum Collection. A careful study 
of these induces me to believe that under the name of R. austrole , 
I included two species as foreshadowed in the above quotation. 
In other words, this name must be restricted to Fig. 7 of the plate 
cited from the “Journal of the Royal Society of N. S. Wales,” 
whilst Fig. 8 of the same reference will require separation under 
a distinct name, and will be now described as Rhizophyllum 
interpunctatum , De Koninck. 
Operculate Rugose Corals are also known to me from Queens- 
land. Mr. George Sweet, F.G.S., collected one at Reid’s Gap, 
apparently differing from either of the preceding, and I saw 
rather indifferently preserved examples of a small form in the 
Geological Survey Museum at Townsville. These will be ulti- 
mately described elsewhere. 
The following are the descriptions of the two N.S. Wales species : 
Genus Rhizophyllum, Lindstrom , 1865. 
(K. Vet. Akad. Forhandl., 1865, No. 5, p. 287.) 
Rhizophyllum australe, Etheridge , fd. 
(PI. xxx., figs. 1 - 6.) 
Rhizophyllum australe , Etheridge, fil., Journ. R. Soc. N.S. Wales 
for 1880 [1881], xiv., p. 248, pi., f. 7 (2 figs.), non fig. 8. 
Rhizophyllum australe (pars), Lindstrom, Bihang K. Vet. Akad. 
Handl. Stockholm, 1882, vii. No. 4, p. 29. 
Sp. Char. — Corallum elongately-pyramidal, more or less curved, 
not greatly expanded above, acutely pointed or truncated below, 
the curvature always towards the convex side ; lateral angles 
rounded and obtuse, when pointed the apex flattened from before 
backwards, not laterally ; section roughly semicircular. Dorsal 
surface moderately convex in the middle, rather flattened at the 
sides ; ventral surface quite fiat transversely, but well curved 
longitudinally. Calice, in depth equal to about one-third the 
height of the corallum ; edge or margin horizontal or slightly 
oblique ; infilling vesicles very numerous, but small ; ventral 
margin or hinge line sharp and bevelled inwards, a few indistinct 
crenulations representing septa ; cardinal septum not visible, 
counter septum prominent, distinct, in a very shallow fossula. 
Operculum semicircular, thick. Epi theca bearing sub-imbricating 
laminae and fine transverse ridges, which slightly crenulate the 
lateral angles ; exothecal outgrowths apparently absent. 
Qf)S, — In my first description of R. australe , the septal char- 
acters were derived from the structure of the conical form, now 
described as R. inter punctatmn. On clearing out the calice of 
the present species, I find that with the exception of the counter 
septum the septa along the ventral margin are confined to a few 
obscure crenulations, and that so far as can be seen there is no 
