234 
SpIEIFERA BICAEIIfAa’A, sp. nov. 
PI. 10, figs. 9 and 13 ; PI. 11, figs. 1 and 3 ; PI. 37, fig. 17. 
Sp. Char. Sliell small, elongately triangular, very alate, and laterally extended. 
Hinge-line niucli extended, straight, greater than the general width of shell. Wings 
sharp, flattened, and narrowly triangular, with the alar angles pointed. Ventral valve 
convex, inflated centi’ally, flaltened at the sides, ii^inus moderately broad and deep, 
angular, bounded by prominent carina, without ribs. Umbo high, overhanging the hinge- 
line. Area very fine and narrow. Pold of the dorsal valve plain, and defined by deep 
sulci, corresponding to the carinro of the ventral valve. Surface bears numerous, 
regular, fine co.st®, usually simple and not often bifurcating, the interspaces bearing 
very delicate microscopic striae, the whole crossed by occasional laminae of growth. 
Ohs. The characters of this little shell appear to be very constant, the extended 
hinge-line, plain sulcus bounded by sharp carinse, sharp alar angles, and the divided-off 
fold in the dorsal valve, all render it a conspicuous and well-marked form. I am unable 
to refer it to any known Australian species, whilst it possesses a considerable distri- 
bution, and strongly recalls some Devonian forms. Its nearest ally seems to be 
Spirifera alhnpinensis,\\. & W.,* from the Wavcriy Group of North America. 
Loc. anclHorison. Corner Creek, Great Star Eivor (A. L. Jack.) ; Gully between 
two peaks on the left bank of the Keelbottom lliver, north of Old Plum-tree Inn 
{B.L.Jack)—'^t&y: Peds; Hawkins' Gully, Kariboe Creek, Kroombit Diggings, Port 
Curtis {W. R. Hands)-, and ? Stony Creek, Stanwell, near Eockhampton (P/m late 
James Smith) — Gympie Beds. 
SriEiFEEA SxEZEr,F.CKir, Re Koninalc, PI. 10, figs. 5-7. 
Spirifera undifera, var. undulata, Etheridge, Quart. Jouni. Geol. Soc., 1872, x-xvili., pp. 330 and 331, t. 15, 
f. 4, t. 10, f. 3-5'. 
Spirifer StrzchcHi, De Koninck, Foss. Pal. Xonv.-Galles tin Sud, 1877 t Pfc. 3, p. 235, 1. 13, f. 1, t. 14, f.l. 
Ohs. A full description of this shell will be found in Prof. De Koninck s Memoir, 
but it may be incidentally mentioned in passing that his figures do not correspond in every 
respect with those of Mr. E. Etheridge, P.E.S., on which he esi ablishcd his species, but this 
may perhaps be owing to the usually indifferent state of preservation of the Gympie 
examples. The following observations are quoted from the original Paper:— “The 
Queensland specimens differ little amongst themselves, allhavingthe well marked mesial 
fold in the ventral valve and eight or ten ribs on either side ; the hinge-line is shorter 
than the width of the shell, and the cardinal angles are rounded. The beak in dorsal valve 
incurved ; there arc faint tracings of the concentric ridges or folds, but, owing to all the 
specimens being easts, the more delicate markings cannot be determined.” {Etheridge.) 
In some points there is a close resemblance between S. Strzeleckii and S. Darivinii. 
Loc. and Rorizon. Lady Mary Ecef, Gympie {The late R. Daintree) ; No. 6 
North Phoenix Mine, Gympie {S. TTM/er)— Gympie Beds ; ? Eichards’ Homestead, three 
miles south-west of Mount Britton Township {R. Rull) — Middle of Marine Series o 
the Bowen Eiver Coal Pield. 
Oenus-SPIRIFEBUSTA, R'Orhigny, 1847. 
(Comptes Kendus, xxv., p. 208.) 
Spieieeeixa nroDECiMcosTATA, McCoy, P1.4'i, fig. 12. 
Spirifera duodeeimeosiata, McCoy, Ann. and Mag. Nat. Hist., 1844, xx., p. 234, t. 17, f. 2 and 3. 
duodecitiicostaUty De Ivoninck, l?oss. Pal. xSouv.-Galles du hud, 18/7, It. 3, p. 231, t. 12, f. • ^ 
Ohs. The perfectly neat oval form with a well-developed area, simple undivide ) 
rounded, and coarse ribs, to the number of six on each flank, a divided fold,^tnd^ 
*U. S. Geol. Explor. 40th Parallel, 1877, iv.. Ft. 2, p. 255, t. 4, f. 6-8. 
