J • 
294 
Gemts— GYBOOEBAS (Von Ifeyer), Be KonincJc, 1844. 
(Desorip. Anim. Foss. Terr. Garb. Belgique, p. 530.) 
G-tbocefas dubitis, sp. nov., PI. 41, fig. 12. 
Sp. Char. Entire shell unknown ; terminal portion of hcdj-whorl produced 
and curved rather irregularly ; sides convex, hut dejrressed ; back or ventral surface 
concave, bounded by a keel on each side; dorsal surface apparently broad, and not acute, 
surface bearing sharp, crest-like, obliquely transverse, somewhat semicircular ridges or 
costse. 
Ols. This interesting fragment would seem to represent a form resembling 
Gyroceras aigoceras, Munster,* but with a different curvature, and sharper and more 
prominent eo.stse. At the same time the very strong likeness it bears to the terminal 
portion of the shell in Ophidioceras, must not be overlooked. The enlargement at the 
distal end probably represents the aperture, and in this case the resemblance becomes 
still more apparent. 
A possible relation n ith the previous Nautilus ? ammonitiformis, has presented 
itself for consideration, and would have been entertained had it not been for the great 
difference between the breadth of the last chamber of the former and that of the present 
fossil, which renders it almost impossible for the two to be portions of one species. 
At the same time the irregular curve of G. duhius is unlike the symmetrical outline of 
G. aigoceras, but only the acquisition of more complete specimens can satisfactorily 
explain the relation of these obscure and indifferently preserved shells. 
Loo. and Horizon. Rockhampton District f (The late Bev. J. E. Tenison Woods; 
Colin. De Vis) — GympieBeds. 
Eamily— G ONI ATITID^. 
Genus— GONIATITES, Be Haem, 1825. 
(Mon. Ammonites et Goniatites, p. 39.) 
Goniatites miceomphaltts, Morris. 
Bdlerophon mkromplialus, Morris, Strzelecki’s Pbys. Descrij). N. S. Wales, &c., 1845, p. 288, t. 18, f. 7. 
„ Dana, Geology Wilkes’ IT. S. Explor. Exped., p. 708, Atlas, t. 10, f. 6. 
Goniatites inicromp}w.lu.s, De Koninck, Foss. Pal. Nouv.-Galles du Sud, 1877, Pt. 3, p. 339, t. 24, f. 5. 
,, ,, Etheridge iil., Proc. R. Phys. Soc. Edinb., 1880, v., p. 304. 
Ohs. Two specimens of this species have been collected by my Colleague, both of 
them casts, without any trace of shelly matter remaining. The form of the shell and 
character of the umbilicus in the Bowen River Coal Eield specimens correspond quite 
well with Professor Morris’s description and figures, but the depth of the body-whorl 
near the mouth is not so great, although the disparity is greater in one of our specimens 
than in the other. However, this need be dwelt on less, since Prof. Dana has given 
such a figure J of G. micromphalus, and on examining those in the Strzelecki Collection 
the same aperture was found to exist in some of the sjiecimens there. 
Loc. and Horizon. Head of Pelican Creek, near Mount Divlin, Bowen River 
(B. L. Jack ) — Middle or Marine Series, Bowen River Coal Eield. 
* Ann. Mus. K. Hist. Nat. Belgique, 1880, v., t. 32, f. 4 (Faune du Caloaire Carbonif^re de la 
Belgique, Pt. 2.) 
+ See note, p 199. 
5 Geology Wilkes’ U. S. Explor. Exped., Atlas, t. 10, f. 6a 
