463 
The Queensland Inocerami appear to indicate an horizon near that of the Lower 
Chalk, although in a collection of fossils forwarded to England by Mr. 'W. Hann, from the 
Bareoo Elyer, fifty miles below ifs junction with the Alice River, Mr. R. Etheridge, 
E.R.S., recognised species having the general /recjcs of British Gault forms.* 
The great variability of the shells forming the genus Inoeeramus renders it very 
difficult to decide on the specific identity of its individuals, and the succeeding 
determinations can only be accepted as provisional. As regards the Australian 
species, this is increased by the fact that in the majority of cases the specimens are 
either too ill-preserved, or too fragmentary, to yield satisfactory results. Specimens of 
a drah-colourcd limestone have been collected by my Colleague on the Flinders River, 
seven miles above Marathon Station, and a calcareous flaggy bed the same distance 
below the Station, entirely composed of the remains of Inocerami. On the Cloncurry 
Road, in localities eight and fifteen miles west of Williams River, a white porous rock 
is completely built up of the disintegrated shelly matter of this genus ; whilst at the 
second of the localities just mentioned specimens of an argillaceous limestone have 
been obtained, with the weathered surfaces covered with white spicular or needle- 
shaped bodies, which are nothing more than the broken-up prisms of the prismatic 
shell-structure of Inoeeramus. These instances will serve to show the relatively great 
abundance of Inoeeramus in the North Queensland Cretaceous Series. 
Inoceeamus Caesoni, McCoy, PI. 25, figs. 9 and 10. 
Inoeeramus Cavsoni, McCoy, Ann. and Mag. Nat. Hist., 186.5, xvi., p. 334 ; Ibid., 1867, xx., p. 196. 
11 ,, McCoy, Trans. R. Soc. Viet., 1860, vii., p. 60. 
„ allied to I. prollenuiticus (D’Orb.), Etheridge, Quart. Journ. Geol. Soc., 1872, xxviii., p. 344, 
t. 22, f. 4. 
Ols. Both Prof. Sir F. McCoy and Mr. R. Etheridge, F.R.S., call attention 
to the resemblance of their respective shells to Inoeeramus mytiloides, Sby. ; and the 
characters mentioned by the former appear hardly sufficient to separate the species. 
Prof. McCoy states that his shell differs from the British “ in having the hinge-line 
rather longer, the anterior end more pointed, and the superior posterior angle rather 
more obtuse.” The undoubted resemblance borne by Mr. Etheridge’s fig. 4, PI. 22, to 
the general figures of Inoeeramus 'prohlematio'iis, D’Orb. {I. mytiloides, Mantell and 
renders it necessary to unite it with McCoy’s J. Carsoni. No absolute description 
of the Australian shell has yet ever appeared, comparison thereby becoming difficult. 
The elongated, somewhat narrow form appears to be the chief chai’actor of the 
species. The shell of those examples I have referred to it is nearly a quarter of an inch 
thick, and the structure very coarsely fibrous. 
Loe. Base of Walker’s Table Mountain, Flinders River {Messrs. Carson and 
Sutherland — National Museum, Melbourne) ; Marathon Station, Flinders River {The 
^ateH. Daintreei) ; ? Landsborough Creek, Thomson River {Prof. A. Liversidge — Colin. 
Sydney University) ; Flinders River, three miles above Richmond Downs Station, in 
drab limestone; and thirteen and a-half miles below the same, in an argillaceous lime- 
stone, with a cone-in-cone structure (J?. L. Jack). 
Inocbeamus Sutueblandi, McCoy. 
Inoeeramus Sutherlandi, McCoy, Ann. and Mag. Nat. Hist., 1865, xvi., p. 334; Ibid., 1867, x.x., p. 196. 
„ „ McCoy, Trans. R. Soc. Viet., 1866, vii., p. 50. 
Ohs. Prof. Sir F. McCoy refers to this shell as much larger and broader than 
I. Carsoni. “ In form, size, and concentric undulations of the surface nearly agrees 
with the French and English common Cretaceous I. Cuvieri, but is less curved at the 
Quart. Journ. Geol. Soc., 1872, xxviii., p. 183. 
