264 
rather small species, with very flat valves, which are so close together that scarcely any 
room remains between them. The ventral valve bears, in the middle, a low sinus, and 
the radial striation of both valves is limited to the median parts, whilst the lateral parts 
remain entirely smooth.” 
Log. and Horizon. Gully rising in clifE between two peaks on left bank of 
Keelbottom Eiver, north of Old Plum-tree Inn {B. L. Jhcit)— Star Beds. 
CnoN-ETEs, sjB. ind. (d.), PI. 37, fig. 19. 
Obs. A somewhat large, elongately quadrate, convex, and high cast occurs in the 
fossihferous masses of Mount Britton. There is a large wide area, deep sinus in the 
dorsal valve of casts, and at least four hinge-spines on each side the umbo. The front 
and sides are densely pitted, but the nature of the surface is unknown. 
This form is only known to me as casts, but probably, judging from its size, is 
allied to the Athelstane Eange species (PI. 13, fig. 8). The septum of the dorsal valve 
was large and strong. The cardinal muscular scars of the ventral valve were small and 
pear-shafied, and in this valve a septum also existed. 
Loo and Horizon. Richards’ Homestead, three miles south-west of Mount Britton 
Township (A. L. Morisset)—M.iMh or Marine Series of the Bowen Eiver Coal Field. 
Order— CLISTENTEEAJ’A. 
Family— LIN GULID^. 
Qenus — LIHGULA, Bruguiere, 1791. 
(Encyolop. Method., i., PI. 250, f. la-c.) 
Lingtoa mxxieoides, J. Sowerbg, ?P1. 13, fig. 19. 
Liwjula mytilloides, J. Shy., Min. Con., 1813, i., p. 56, t. 19, f. 1 and 2. 
„ mytaoides, Davidson, Mon. Brit. Garb. Braoh., 1861, Pt. 4, p. 207, t. 48, f. 29-36. 
Ohs. Except that the specimen referred to this species is rather more angular 
along the middle line of the valve, it is difilcult to distinguish it from typical examples 
of L. mgliloides. The test is preserved over half the surface of the specimen. Dana, 
in his Work on the Geology of the Wilkes Expedition, describes a species. Lingula 
ovata^ which may perhaps also bo the present shell. It is ” quite small, much 
convex, regularly broad ovate, with the front margin not at all truncate. Beak acute, 
valves thin, smooth, with faint concentric lines of growth.” 
The genus Lingula is of so scarce an occurrence in Australian Permo- 
Carboniferous rocks that the present specimen is of some importance. 
Loo. and Horizon. Spring Creek, Cania, Burnett (W. H. iJswds)— Gympie 
Beds. 
Section— MOLLUSCA VERA. 
Class — Pelecypoda. 
Order— OSTRACEA. 
Family— PECTINID a:. 
Oemis—EHTOLIUM, Meelc, 1872.* 
(Hayden’s Final Report E. Nebrask.a, p. 189.) 
Ohs. The existence of this, as an Australian genus, depends upon a few small 
and ill -preserved specimens in the Star Eiver collections, made by my Colleague, and 
*:Prof. James Hall says-“Pal. California, 1864, i., App. B., p. 478.” and that EntoUuml^^ 
Palseozoic sense is but a synonym of Pei-nopectcn, Winobell. See Pal. JST. York, 1886, v., Pt. 1, No. 2, p. IvU- 
