288 
Ols. This unsatisfactory specimen is figured more as a record of a species than 
as aifording detailed characters of the same. The specimens are impressions of the 
apical portions from which easts have been taken. The reference to Mourlonia is even 
provisional, and has been made from the outward resemblance of the fossils to species of 
that genus. 
Loo. and Horizon. Banana Creek, near Banana, Dawson itiver (if. Machay ; 
Colin. De Vis) — Middle or Marine Series, Bowen Eiver Coal Meld. 
Genus— TVANIA, Bayle, 1885.* 
Ols. Yvania is another offshoot from the old genus Pleurotomaria, in its 
Carboniferous sense. It is, in fact, a turrieulated Pleurotomaria, in which the 
horizontal and vertical portions of each whorl unite in a right angle. The band and its 
sinus are on the flat or horizontal portions, and it is impossible to see them in a side or 
profile view. The shells are ornamented by spiral grooves and ridges, aud there is a 
small umbilical fossette. 
Yvania is typified by the Belgian TrocJms Yvanii, Leveille. 
Yvania Konincki, Bth. jil., PI. 41, fig. 7. 
Baylea Koninckii, Eth. fit, Records Geol. Survey N. S. Wales, 1890, ii., Pt. 2, i). 82. 
Sp. Char. Shell small, conical, of about six angular and deeply carinated whorls. 
Aperture unknown. Upper portion of the whorls not absolutely flat, but a little 
sloping, at the edge of which, and the vertical part of the whorl, is situated the band. 
On the former are placed eight sharp, spiral ridges, with wide semi-concave interspaces, 
but no evidence of any cross striation. Umbilicus small and inconspicuous. Height, 
eight millimetres (in a broken state). 
Ohs. This is a very pretty shell, coming nearest to the Eui'opean Yvania 
spirata, De Koninck ; it is, however, much less in size and has a more prominent 
band. 
Loo. and Horizon. Eoekhampton District t {0. W. Be Vis ; Colin. De Vis) — • 
Grympie Beds. 
Genus — LUGIBLLA, Be Koninch, 1883. 
(Ann. Mus. B. Hist Ivat. Belgique, viii., p. 107.) + 
Ohs. A depressed, conical, and trochiform PleurotomariaAik& shell, usually 
rough and lamellar, and variously ornamented. The body-whorl frequently becomes 
flattened and partially horizontal, with a sharp periphery, below which, on the lower 
side, the baud is situated. 
Casts of a small shell have been found in the Eoekhampton Beds, probably 
referable to this genus. 
Ltjciella ? Ghatie, sp. nov., PI. 41, fig. 6. 
Sp. Char. Depressed trochiform, of four or five whorls, the upper ones conical, 
but the body-whorl more or less concave, turning upwards towards the periphery, 
which is sharp. Surface of each whorl crossed by transverse oblique and curved 
striae, aud with equally fine spiral striae, the points of intersection becoming minutely 
nodular, producing a most delicate reticulation. 
* Teste Eisclier (Man. Conchy), et de Pal. Conchy!., 1887, p. 857)= Baylea, De Koninck (Ann. -Mus. 
R. Hist. Nat. Belgique, 1883, viii., p. 68), non Bayleia, M. Chalmas, 1873. 
t See note, p. 199. 
+ Eaune du Calcaire OarboniKre de la Belgique, Pt. 4. 
