68 
ventral valve of a large Bracbiopod, with indications of a long septum, a moderately 
wide but not high area, and a particularly lofty umbonal region. Notwithstanding its 
imperfect state it even now measures 3 inches square. 
I am not acquainted with any other Devonian shell of sufficient size to 
be confounded with this, and have, therefore, provisionally referred it to Stringo- 
cephalus. 
Loc. and Horizon, banning Old Station, Burdekin Downs ; Banning Lime- 
stone. {R. L. JacTc.') 
Family— STEOPHOMENIDiE. 
Genus— ORTHOTRTES, Fischer, 1829. 
(BiUI. Soc. Imp. Nat. Moscoii, 1829, p. 375.) 
Oethotetes umbeactjotm, Schlotheim. 
TerehraMites nmh-atulum, Schl., Petrefactenkimde, 1820, p. 2,56. 
Streptorhynchus umbraculum, Davidson, Mon. Brit. Dev. Braoh., 1865, Pt. 2, p. 70, t. 16, f. 6; 
1. 18, f. 1-5. 
Spirifera crenistria, Phillips, Geol. Yorkshire, 1830, ii., p. 216, t, 9, f. 6. 
Streptorhynchus crenistria, Davidson, loc. eit., 1865, Pt. 2, p. 81, t. 18, f. 4-7. 
Orthoteies crenistria, De Koninok, Poss. Pal. Nouv.-Galles du Sud, 1877, Pt. 3, p. 212, 1. 10, f. 8. 
„ „ Etheridge fit, Proc. R. Phys. Soo. Edinb., 1880, v., p. 272. 
Ols. The late Dr. Davidson called attention to the questionable separation of 
Orthoteies umlraculum, Schl., sp., and 0. crenistria, Phill., sp., and explained how the 
two species had been confused by Authors. Tt appears from his own showing to be a 
multiplication of names, as no good line of demarcation exists between the so-called 
species. 
In the Queensland Devonian examples the ventral valve is convex, the interspaces 
between the coarser ribs being occupied by from three to four finer ones. The dorsal 
valve is flat, or a little concave. One of the specimens in its present state is quite 
3 inches wide by 2 inches high, but when perfect was wider. On the other hand no 
great depth existed between the valves. Like typical forms of O. umbraculum, the 
present shells possessed a well-developed area. 
Loc. Fanning Old Station, Burdekin Downs. {B. L. Jack.') 
Oetuotetes ? COKCENTMCA, sp. nov., PI. 37, figs. 13, 14. 
Sp. Char. Transversely semicircular, compressed, slightly curved, thin towards 
the front. Ventral valve flatly convex above, becoming concave towards the front; 
umbo projecting outwards almost at right angles to the hinge line, and very sharp. 
Dorsal valve slightly rounded in the umbonal region, and following the contour of the 
ventral valve. Area large and triangular, almost flat. Surface of the ventral valve 
with faint radiating lines, crossed by markedly concentric imbricating laminse, giving 
rise to a dull reticulation. Dorsal valve ornamented in a similar manner, but the 
concentric laminse predominating. 
Obs. This is a peculiar and interesting little form, especially in the ornamentation 
of the surface, which is not of a character usual in this genua. In outline it seems to 
approach Streptorhynchus pectiniformis, Dav,,* of the Salt Kange Group, India, more 
than any other species. 
Loc. Fanning Old Station, Burdekin Downs. {B. L. Jack) 
* Waagen, Pal. Indica, Ser. xiii., Vol. i.. No. 4, Pt. 3, t. 55, f. 4-11. 
