471 
disappearing oh the posterior groove ; siphonal ridge smooth, with three narrow rounded, 
ridges, three rather wide shallow grooves between, which become faint as they widen 
towards the margin ; escutcheon long, ovato, with a flat groove on each side, striae on 
the lower part, the rest smooth, margins raised ; hinge teeth thick, large, prominent, 
with two grooves on the upper edge, and about thirteen close, neat, parallel lateral 
grooves ; shell thick. {Ten. Woods.) 
Obs. Although this shell was described from a ISTew South Wales locality, the 
latter is so near the Queensland border that it is thouglit advisable to include it here. 
T. mesembria, Mr. Woods states, is one of the group QlahrcB,ov smooth Trigonia, 
and approaches nearest in its form to T. dtinsoombensis, Lycett, from the British Upper 
G-reensand. It is said to be quite distinct from the other Australian species T. Moorei, 
Lycett, T. lineata, Moore, and T. nasuta, Eth., although in outline nearest to the latter. 
Loo. Mount Stewart .Bun, Glrey Eanges, JIcw South Wales, near the South 
Australian and Queensland borders {The late llev. J. D. T. Woods — Colin. Woods). 
TniGOifrA, sj}. ind. (5), PI. 21, fig 21. 
Obs. A small and fragmentary but well-defined valve apparently of a Trigonia is 
represented in PI. 21, fig. 21. The interior is exposed, but unfortunately the umbo and 
cardinal margin have disappeared. It possessed a ventricose appearance, a much 
attenuated posterior end, a strongly marked diagonal ridge, and a large posterior slope 
for the size of the valve. The latter appears to have borne three, or perhaps more, well- 
defined ridges. The interior is highly nacreous, and when this layer is removed the 
external impression of the shell is visible with strong concentric ridges. 
This form has a strong resemblance to a small and peculiar species, T. seniiornata, 
figured by A. D’Orbigny from the Cretaceous rocks of South America.* 
Loo. Blackall Hoad, nine miles from Tambo, accompanied by Belemnites, in a 
shelly limestone {B. L. Jack). 
Family— ASTAETID Ail. 
Genus — ASTABTB, J. Soioerbg, 1816. 
(Min. Con., ii., p. 85.) 
Astaete woLLtTMBiLi/iExsis, Moove, PI. 27, fig. 16. 
.Astarle woUumhilkensis, Moore, Quart. Journ. Geol. Soo., 1870, xxvi., p. 250, 1. 12, f. 12. 
Sp. Char. Shell small, thick, ovately orbicular, gibbous ; umbones large, mesial ; 
posterior side rather extended, anterior slightly oblique ; ventral margin rounded ; 
shell covered with numerous regular concentric rugee, with deepish interspaces, and with 
three or four interrupted folds of growth. {Iloore.) 
Qbs. The generic relations of this species arc still quite an open question. 
Moore’s description and figure do not throw any light upon them. 
Loo. Wollutnbilla {The late Bev. W. B. Clarke). 
Order— lUCINACEA. 
Family— LUCINIDiE. 
Genus — COBBICTSLLA, Lgcett, 1857. 
(Handb. Cotteswold Hills, p, 128.) 
COKBICEELA ? MAEANOANA, sp. nOV. 
PI. 27, figs. 4 and 5 ; ? PL 28, figs. 2 and 3. 
Sp. Char. Shell elongately oval, r.ather pod-shaped, with a slight obliquity to 
the posterior, almost equilateral ; valves gently convex, not inflated nor gibbous ; dorsal 
* Dumont D’Urville’s Voy. au Pole Sud Geolojie, Atlas, 1847, t. 7, f. 31. 
