293 
It also resembles some species of Trochoceras. The older and inner whorls of this 
shell are very like a Cephalojpod called Nomismoceras spiratissimuin, Holzapfel,* * * § 
from the Carboniferous Limestone of Erdbach near Herborn, Germany, but the latter 
species appears to be smooth, and the whorls do not appear to enlarge and expand in 
the manner shown. 
Loc. and Horizon. Eockhampton District f ((7. W. He Vis and Mev. J.H. 
Tenison Woods; Colin. De Vis) — Gympie Beds. 
Family— OETIIOCE RATI D.^. 
Genus — ORTHOCEBAS, Breynius, 1732. 
(Dissert. Phys. Polythalamiis, pp. 12 and 23.) 
Obs. The remains of this genus appear to be very uncommon in the Queensland 
Permo-Carboniferous Series, and when met with exceedingly fragmentary. 
A terminal portion of an Orthoceras (PI. 15, fig. 1), three inches long and rather 
crushed, was obtained from the Gympie Beds. Its present diameter is one and 
a-half inches, with obliquely curved transverse stria;, rather than ridges, and resembles 
in general appearance De Koninck’s figure J of O striatum, J. Sby., although 
the longitudinal striation visible on that fossil is not preserved in the present 
specimen. 
Fragmentary remains of the genus are met with in the Star Fiver Series ; one 
form, without traces of external ornament, possessed distant septa ; another had close, 
fine, thread-like, waved striae; whilst in a third the ornament was similar, but less waved, 
coarser, and separated by interspaces with a breadth equal to rather more than the 
thickness of the striae. 
The Mount Britton Beds have yielded the only specimen yet seen in the round 
(PI. 39, fig. 10), showing portions of five chambers, one and three-quarters of an inch 
long, and one inch in diameter. The chambers are about a quarter of an inch in depth, 
with a circular section. The specimen is dennded of the test. 
In the Collection made by Mr. De Vis are two other Orthoceratites. One consists 
of seven narrow chambers in a space of twelve-sixteenths of an inch, to some extent 
flattened like De Koninek’s figure of his Camcroceras Pkil!ipsii,§ with a vertical linear 
depression in the middle line. It is ten-sixteenths of an inch wide. 
The other species is represented by two narrow, small shells, about the dimen- 
sions of O. Martinianum, De Kon.,|| but very delicately transversely striated. They 
tfieasure two and two and a-half inches respectively, four-sixteenths wide at the 
distal end, tapering to a fine point. The septa are about one-sixteenth of an inch 
‘tpart. 
Loc. and Horizon. Gympie (B. L. Jack') — G 3 Tnpie Beds ; Corner Creek, Great 
Star River {B. L. Jae^)— Star Beds ; Richards’ Homestead, three miles south-west 
of Mount Britton Township (R. L. JacHc ) — Middle or Marine Series of the Bowen 
P’iver Coal Field; Rockhampton District (C. W. He Vis; Colin. De Vis) — Gympie 
Peds. 
* Dames and Keyser’s Pal. Abhandlungen, 1889, i.. Heft 1, t. 4, f. 8. 
+ See note, p. 199. 
JFoss. Pal. Nouv.-Galles duSud, 1877, Pt. 3, p. 341, t. 24, f. 2. 
§ rm., p. 344, t. 24, f. 1. 
WJhid., p. 343, t. 24, f. 3. 
IT Sec note, p. 199. 
