202 



present specimens to the Museum Collection. A careful study 

 of these induces me to believe that under the name of R. australe, 

 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 Rlhizojjhyllum 

 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. 



Tlie following are the desci'iptions of the two N.S.Wales species : 



Genus Riiizophyllum, Lindstrom, 1865. 



(K. Vet. Akad. Forhandl., 1865, No. 5, p. 287.) 



Rhizophyllum australe, Etheridge, fil. 



(PI. XXX., figs. 1 - 6.) 



Rhizophyllum australe, Etheridge, fil., Journ. R. Soc. N.S.Wales 

 for 1880 [1881], xiv., p. 248, pL, 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 flat 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. Epitheca bearing sub-imbricating 

 laminpe and fine transverse ridges, which slightly crenulate the 

 lateral angles ; exothecal outgrowths apparently absent. 



Ohs. — In my first description of R. australe, the septal char- 

 .acters were derived from the structure of the conical form, now 

 described as R. iuterpuiictatum. On clearing out the calice of 

 the present species, 1 find tliat with the exception of the counter 

 septum the septa along tlie ventral margin are confined to a few 

 obscure crenulations, and that so far as can be seen there is no 



