230 
flank ; tlie umbo is prominent and sharp. The fold of the dorsal valve is proportionately 
narrower than in De Koninck’s illustration, and there are faint indications of shght 
ribs, hut these are the only points in which our specimen differs from 8. Clarkei. 
valves bear traces of strong concentric lamiusB. ivririrllp 
Loc. and Horizon. Stonehumpy Creek, Bowen Eiver (E. Bdelfelt) Middl 
or Marine Series of the Bowen Eiver Coal Eield. 
Spiiufera teigoualis, Martin, sp. 
Spieifeea teigonaeis, var. bisulcata, J. de C. Soiverly, PI. 9, fig. 15. 
Sj5i«/ero6MOT«a,J.deC.Sby., Min. Con., 1825, V., P.152,, t. £E. 1, 2. p. , . 5 f 1 t. 0, 
triffonalis, var. hisidcata, Davidson, Mon. Bnt. Garb. Braoh., 18 j7, . , P- > • > > 
f. 1-19, t. 7, f. 4; md., 1802, Pt. 5, p. 222. _ . t . 
„ allied to S. bisulcata, Etheridge, Quart. Journ. Geoh Soc., 1872, P; 17, 1. 1. 
Spirifer bisuloatm, De Koninck, Foss. Pal. Nonv.-Galles du Sud, 1877, Pt. 3, p. 246, t. 14, f. 5. 
Obs. Both in the Permo-Carboniferous rocks of New South 'Wales and Queens- 
land, a -Spmjem occurs, sometimes acquiring considerable dimensions, and possessing 
many of the characters of the common -S', bisulcata. The cost® in this species are very 
characteristic, and are either flat or flatly rounded, close to one another, and frequen y 
bisulcate. Both the fold and sinus are similarly occupied. The costse and mtercosta 
spaces arc minutely and longitudinally striate, and, when in a good state of preservation, 
very mmute and very wavy. Similar lines can he detected accompanying the lines ot 
growth in a transverse direction. This is a marked feature in -S', bisulcata, and equal y 
so in the Queensland shells. The latter appear to me to he less convex and 
than the present variety of Martin’s shell, and in some points almost to agree better 
with the var. crassa, De Koninck. Although the tendency of the ribs to arrange thein- 
selves in three groups on the fold is not to any great extent marked, it is still apparent. 
In two of our specimens the long reniform vascular impressions are well displayed ana 
as I do not remember to have seen an illustration of this anatomical point in 8. bisulcata, 
a fagure^of itjs^g^en.^^^^^ Bowen Eiver {The late B. Dufiitree) -Middle or Marine 
Series of the Bowen Eiver Coal Field ; Eockhampton District * (0. W. De Vis ; Colin. 
De Vis) — Gympie Bods. 
Seieifeea teigoxalis, ? oar. acuta, Etheridge, PI. 10, fig. 12. 
Spirifera bisulcata, var. acuta, Etheridge, Quart. Joum. Geol. Soc., 1872, xxviii., p. 320, t. 16, f. 1. 
Obs. The varietal name acuta was applied by Mr. E. Etheridge, P.E.S., o ^ 
shell which appears to differ from ordinary forms of 8. trigonalis and its varieties, 
its much feweh and simpler ribs, and grooved fold. I am not prepared to offer any 
suggestion as to its identity other than the above. 
Loc. and Horizon. Gympie {The late R. Daintree) -Gympie Beds. 
Spieieeea teigottaets, var. ceassa, De Koninck, PI. 11, fig- 5. 
Spirifo-erassus, De Koninck, Rech. Anim. Foss. Terr Garb. Belglaue, P 262, t. 15 &«, f. 5. 
Spirifera crassa, Davidson, Mon. Bnt. Garb., Brack. , 1857, Pt. 1, p^. 
, trigonalis, var. crassa, Davidson, loc. cit, 186.., Pt. o, p. 2^2. _ 
Obs. We have before us (PI. 11, fig. 5) a portion of a large decoi^a^^ 
8pirifera, resembling in general outline and appearance Martiniogsis subraaiata, 
but with the exterior bearing the almost flattened “rounded, unequal, bifuicat^ 
See note, ii. 199. ^ 
