248 
Pkobtjcttis coea, B'Orligny. 
PI. 12, fig. 14; PI. 13, fig. 1 ; PI.' 38, fig. 11. 
Productus Cora, D’Orbigny, Pal. Voy. Am&ique Merid., 1842, iii., Pts. 3 and 4, p. 55, t. 5, ff. 8 and 9. 
,, ,, Davidson, Mon. Brit. Carb. Braoh., 1861, Pt. 4, p. 148, t. 36, f. 4, t. 42, f. 9. 
„ ,, Etheridge, Quart. Joarn. 6eol. See., 1872, xxviii., p. 328, t. 15, ff. 1 and 2. 
,, „ Etheridge fil.. Cat. Australian Eoss., 1878, p. 51. 
„ „ De Koninck, Foss. Pal. Nouv.-Gall6.s du Sud, 1877, Pt. 3, p. 184, t. 9, f. 1. 
Obs. P. cora was first detected as a Queensland fossil by Mr. Etheridge in the 
Collection made by the late Mr. P. Daintree. His remarks were as follows : — “ Our 
shell was evidently very thin and fragile, with a gibbous ventral valve, the surface 
covered with straight, wavy, or flexuous longitudinal thread-like strim or ribs, and few 
spines. The dorsal valve shows the rugose undulating folds or wrinkles at the 
cardinal angles. We fail to see the concentric lines crossing the ribs on our examples, 
owing to their condition ; and the places of former spines are faintly traceable.” 
The surface of slabs of the chloritic rock of Gympie are often covered with 
crushed examples of this species, and my Colleague has collected a number of similar 
smaller Produoti, both dorsal and ventral valves, which are probably identical. 
Three-quarters of a valve has also been obtained from the Eockhampton Beds, 
showing the fine regular striation, spinose wings, and coarsely wrinkled flanks of this 
well-marked species. A second, which may be either P. cora, or P. semireticulatus, has 
also been found by Mr. Smith. The flanks of this specimen are too much wrinkled for 
the former, although the fineness of the strise would indicate P. cora as its proper refer- 
ence. The character of the wings and the strong spines thereon do not assist in a 
determination, as these are features common to both species. On the whole, I am 
inclined to refer this shell, from the Training AVall Quarries, to P. cora. Exceedingly 
well-marked casts have been collected from the rich beds of Mount Britton, by Mr. 
A. L. Morisset, exhibiting similar features to the Eockhampton specimens. 
Loc. and Horizon. Hew Caledonia Eeef, Gympie {The late P. Daintree ) ; 
Gympie (P. L. JaeJe) ; Stony Creek, Stanwell {The late James Smith) ; Training AVall 
Quarries, Eitzroy Eiver, Eockhampton {The late James Smith ) — Gympie Beds ; South side 
of Mount Britton {A. L. Morisset ) — Middle or Marine Series, Bowen Eiver Coal Eield. 
Peoductus beacutthjeetjs, G. Sowerly. 
PI. 12, figs. 10-13 ; PI. 13, fig. 5 ?; PL 44, fig. 14. 
Productus brackythwrus, G. B. Sby. in Darwin’s Geol. Obs. Volo. Islands, 1844, p. 158. 
, „ Morris in Strzelecki’s Fhys. Descr. N. S. Wales, &c., 1845, p. 284, t. 14, f. io 
non 4a and 4i<). 
„ „ De Koninck, Mon. Genre Productus, p. 241, t. 16, f. la and 5 (non Ic and d). 
„ suhqimdratus, De Koninck (non Morris), loc. cU., p. 203, t. 14, f. Ic and d (? la and h). 
,, brachytluerus, De Koninck, Mon. Productus et Chonetes, 1847, p. 102, t. 16, f. la and 6 (non 
Ic and d). 
,, subquadratus, De Koninck (non Morris), Ibid, t. 14, f. lo and d (? la and b). 
„ brachythairus, Dana in Geology Wilkes’ U. S. Explor. Exped., 1849, Vol. x., p. 686, Atlas, t. 2, £■ 8- 
„ ,, D’Orbigny, in Dumont D’Urville’s Voy. au Pflle Sud, 1846, Palseontologie, Atlas, 
t. 6, f. 6 and 7. 
,, frar/Uis, Dana, American Journ. Sci., 1847, iv., p. 153. 
„ ’ ,, Dana, loc. cil., p. 686, Atlas, t. 2, f. 7. 
„ brack i/tli(erus, Do Koninck, Foss. Pal. Nouv.-Galles du Sud, 1877, Pt. 3, p. 198, 1. 10, f. 4 and 4a 
(t. 11, f. 1 ?). 
„ fragilis, De Koninck, loc. cit., p. 201, t. 10, f. 3 and 3a. 
„ hrachythesrus, Etheridge til., Proc. R. Phys. Soc. Edinb., 1880, v., p. 284, t. 8, f. 16, i'- 
f. 17 and 18. 
Sp. Char. Shell of medium size, subtrapezoidal to subrectangular, non-lobate, 
more or less reflected, or geniculate, and generally gibbous. Ventral valve very gibbous 
