263 
In the Keelbottom Hivcr Series a somewhat similar shell is found, but less 
convex, and very strongly ribbed, with the hinge abou equal in length to the shell. The 
ribs arc coarse and bifurcate, about thirty-five previous to division, and irregularly rounded. 
It is quite possible that both these shells are one species, but in the presence 
of the immense number of Ohonetes already described, it is impossible to venture on 
a name, especially when dealing with imperfect material. 
Loc. and Horizon. Corner Creek, Great Star Iliver (S. L. Jack) ; Gully rising 
in cliff between two peaks on loft bank of Keelbottom River, north of old Plum-tree Inn 
(J?. L. Jack) — Star Beds. 
CnoiTETES, sp. ind. (J.), PI. 13, figs. 7, 8, and 13. 
[Compare G, australis, McCoy, Prod. Pal. Viot., Deo. iv., 187fi, t. 35, fig. 1.] 
Ohs. The present Glioneies differs wholly from either of the preceding. The 
ventral valve is broad and semicircular, quadrate, deeper than wide, and very slightly 
convex. The hinge-line was as long as the shell, and when perfect the alar angles 
bluntly pointed, but, as a rule, they ai’o broken. A moderately broad hinge appears 
to have been present, and thei’o arc the remains of several well-developed hinge-spines. 
There was a well-marked septum in both valves, and the inner surface highly pustuloso, 
and punctate. The surface boro numorous distinct bifurcating ribs, and there is some 
indication of their having been spinoso. 
This species is probably closely allied to Chonetes auslralis, IVTcCoy. It is 
certainly not C. lapuessiana, as figured by Do Koninck from New South IV ales, and 
it does not appear to be a large form of G. cracowensis. It is also advisable to 
compare, in passing, Chonetes falMandica, Morris and Sharpe,* with which there is 
again some resemblance. Except that it is a larger species, G. illinoisensis, Worthen,t 
Would represent our shell, especially in the very largo number of cost®. The latter 
are numerous, but less so than in G. falMandica, and coarser; they bifurcate high up on 
the visceral region, and are prominent and bold, although not coarse. 
Loc. and Horizon. Atbclstane Range, Rockhampton {The late James Smith)-, 
Stony Creek, Stanwell, near Rockhampton {The late James Smith) — Gympie Beds. 
Chonetes, sj). ind. {c.), PI. 37, fig. 20. 
Ohs. A small, very flat shell, the ventral valve slightly elevated below the umbo, 
then depressed in the middle line, producing a broad and very flat sinus. The hmge- 
line as long as the shell, and the alar expansions also apparently flattened. The area is 
small, and the septum extends for about half the height of the valve. The ribs are very 
numerous and fine, and each one bifurcates ; they must have been provided with regular 
concentric rows of spines, as the depressions representing the actual ribs are regularly 
pitted. The lateral ribs are much curved outwards, whilst the umbo was very fine 
3-nd small. 
This pretty little cast at times looks more lilce an Orthotetes or Streptorhynchiis, 
than a Ohonetes. The tripartite division of the surface probably arises from a rather 
flatly prominent central region, and flattened nlar expansions 
This is evidently not far removed from Chonetes coniprersn Waagen.J and, in 
^8'Ct, differs chiefly in the alar regions, being delicately striate, iirslead of quite plain. 
Waagen’s remarks ajrply well to our specimens, bearing in mind that his examples were 
perfect, comparatively speaking, whilst ours are only impressions. He says “ Ihis is a 
* Quart. Journ. Geol. Soc., t84G, ii., p. 274, t. 10, f. 4. 
t Illinois Geol. Keport, 1868, iii., t. 15, {.8. 
t Pal. Inclica (Salt Range Possils), 1884, Ser. xiii., Vol. i.. No. 4, faso. 4, p. 030, figs. a-d. 
