25G 
The umbonal region and hinge-line are, unfortunately, not preserved, and in consequence 
a direct reference to Ji’roducfus may have elements of doubt, but, at the same time, I 
cannot satisfactorily compare it to any other Brachiopod. The spines are too coarse 
and much too far apart for either an Atliyns, such as Roysii, or a Meticularia, like 
B. lineata. Had it not been for the regular concentric method of arrangement of the 
spine bases, JP. spinulosus, J. Sby., might have put in a claim for comparison. 
Loc. and Horizon. Stony Creek, Stanwell, near Eockhampton {The late James 
Smith) — -Gympie Beds. 
Peodtjctus sp. ind. (c.), PI. 13, Pig. 4. 
[Compare Produotus pi'cdongus {Shy.), Davidson, Mon. Brit. Dev. Brach., 1865, Pt. 2, p. 602, t. 19, f. 22-2 j.] 
Obs. A very remarkable fragment is represented in the above figure. It is the 
external impression of the ventral valve of a Productus, regularly and delicately striate, 
with a slight median ridge, representing the cast of the mesial sinus, on which are five 
pits in a line. These are the impressions of spines, and both the position of them and 
the general appearance of the fossil, strongly recall to mind the structure of Produetus 
pralongm, Sby. It is, however, probable that the shell possessed a more regular shape 
than that species. A similar distribution of spines is met with in Produetus mesolobus, 
Phill., to some extent, accompanied by other characters which are not present in our 
fossil. 
Loc. and Horizon. Stony Creek, Stan well, near Eockhampton {The late James 
Smith) — Gympie Beds. 
Peoductus, sp. ind. {d.), PL 40, fig. 4. 
Ohs. A small and peculiar, partially decorticated specimen of the P. costatus 
group. It is a ventral valve with a long straight hinge, depressed broad visceral regions, 
irregularly and concentrically wrinkled, whilst the central front, and that portion of the 
surface only, bears distinct, fine, and well separated vertical ribs, the sides being free. 
Some of the i-ibs bifurcate, whilst others seem to have been spined. The concentric 
wrinkles are strongly marked on the alar expansions. 
Only one example of this peculiar little shell has come under my notice, 
otherwise I believe the characters are sufficiently peculiar to warrant a name being 
given to it. The form and nature of the costae indicate P. costatus as the group to 
which it is referable, but in this species the whole of the front bears ribs, except a very 
limited portion'of the ears, but in our specimen the limitation is a very marked one. 
In a like manner it differs from the allied Indian species Produetus indicus, IVaagen, 
P. vishnu, Waagen, &c. 
Loc. and Horizon. Eockhampton District * {G. W. Be Vis; Colin. De Vis) 
Gympie Beds. 
Peobuctus, sp. ind. (e,), PI. 37, fig. 18. 
[Compare P. Huniboldti, D’Orbigny, in Waagen, Pal. Indiea (Salt Lake Fossils), 1884, Ser. xiii., Vol. i; 
Pt. 4, faso. 4, p. 695, t. 76, f. 1-3.] 
Obs. This peculiar and well-spined form has caused me much trouble, and I a® 
not even now prepared to say to which of the known species it should be referred, 
is a decorticated cast of a rather transverse ventral valve, with a moderately long hinge- 
line, a wide open sinus, a well incurved beak, and vertically elongated, somewhat tear^ 
shaped spine bases arranged roughly in quincunx, those of one row alternating wi 
See note, p. 199. 
