442 
On tile subject of the Class Polyzoa generally, Moore made the following 
I’oniarks : — “ It is not improbable that this group maybe numerously represented, as 
there are frequent indications of Polyzoa ; hut the worn condition of many of the 
shells to which they are attached is unfavourable to their preservation. On a cast of a 
Cytlierea from the Maranoa Eiver numerous reticulated iinjiressions show that its 
interior was almost covered with them.” 
Loo. Wollumbilla (TAe fafe iSer. W. B. Clarke). 
Class — BiiAcnioPODA. 
Order— TRETENTERATl, 
Eamily— TE B EBEATULID^. 
Genus— TEBEBRATELLA, D' Orliffmj, 1847. 
(Comptes Keiidus, xxv., p. 209.) 
TeeebbateIjLA Datidsonii, Moore, PI. 20, figs. 7 and 8. 
TcrchrateUa Davidsonii, Moore, Quart. Jouni. Geol. Soo., 1870, xxvi., p. 213, t. 10, f. 1 and 2. 
Sp. Char. Shell rather large, transversely ovate or subtrigonal, slightly convex ; 
beak truncated ; ventral area e.xteuded and slightly depressed below a lengthened, 
slightly rounded hinge-line. The surface of the valves exhibits distinct but very 
minute punctations, and possesses wide concentric bands, on which are regular but 
much finer lines of growth ; these are crossed by numerous radiating striae, which, 
towards the margins of the folds, give the shell a fimbriated appearance, very fine plicm 
being visible on the whole of the surface. The larger or dorsal valve possesses a wide 
mesial fold, with a corresponding sinus ou the ventral valve. {Moore.) 
Obs. Three examples of this very pretty species occur, but only one is free from 
the matrix and tolerably perfect, and, to all appearance, belonging to Terebratella, 
under which genus (in the absence of internal structure) it is placed. It is the largest 
of the Australian Brachiopoda, and I have named it T. Eavidsonii, after the Palmonto- 
logist who has spent a life in the elucidation of this important group. {Moore.) In 
another specimen, collected by Mr. Sweet, the fold is very flat, and hardly perceptible. 
Loc. Wollumbilla {The late Bee. W. B. Clarke; G. Sweet — Colin. Sweet, 
Melbourne). 
Family— THECIDEID^. 
Genus — ABGIOPE, Ecslonchamps, 1842. 
(Mem. Soc. Linn. Normandie, vii., p. ix.) 
Argiope ? woLiTJMBiLLiENSis, Moore, PI. 20, figs. 9-11. 
Ari/iope wollmihillcensis, Moore, Quart. Journ. Gaol. Soo., 1870, xxvi., Pt. 2, p. 243, t. 10, f. 3-5. 
Sp. Char. Shell compressed, transverse ; hinge-line extending the entire length 
of the shell ; umbones depressed ; ventral area extended ; deltidium narrow, triangular ; 
exterior of the valves covered with coarse rounded strite, which are broken at the 
concentric lines of growth, whore they are seen to be hollow, and wore probably 
continued in spines over the folds of the shell ; exterior of dorsal valve abruptly keeled, 
the linos of growth crossing, which give the keel a comb-like appearance; interior of 
the dorsal valve with a sinus, which terminates at the front of the shell in a deep fold, 
and it possesses teeth-sockets, cardinal process, and distinctly raised crural plates ; 
ventral valve, in its younger state, rather flat, but becomes concave and closely fitting 
