464 
ventral margin near tie ieak, and ratier narrower and more acute at tie anterior end. 
Z. Cuvieri is suci a distinctive and well-marlced .siell tiat it is better to retain tie 
pre.sent species separate. 
Loc. Base of Walker’s Table Mountain, Blinders Biver {Messrs. Carson and 
Sutherland — National Museum, Melbourne) ; Blinders Biver, three miles above 
Eicimond Downs Station, in drab limestone ; and twenty-one miles below' the Station, 
in a similar rock {It. L. Jaclc). 
Inoceeamus peewoides, Jdtheridye, PL 25, figs. 7, 8, and 12. 
Inoceramus pemoides, Etheridge, Quart. Journ. G-eol. Soc., 1872, xxviii., p. 343, t. 22, f. 3. 
Sp. Char. Shell quadrate, deep ; umbonal region thick and elevated ; beaks 
acute ; anterior side slightly convex ; the ventral margin broadly rounded ; surface 
marked by alternating groups of fine and coarse concentric folds, or large undulations. 
{Etheridge.'} 
Ohs. This shell much resembles I. regularis, D’Orb., in shape, size, and mark- 
ings, but the wing or hinge-area is not so long. It is almost identical in shape with 
I. Lamarckii, I. latus, and I. crispus, Mant., but the concentric undulations are not so 
unequal and pronounced, neither bad this shell a corrugated and thickened fold along 
the hinge-line, as in I. Lamarckii ; the teeth or hinge-pits are not seen. It is evident that 
this is an abundant species in the Cretaceous rocks of Queensland, its remains being 
numerous and usually fragmentary. {Etheridge.') 
A large shell (PI. 42, f. 7) measuring six inches in length and four wide, the 
longest diameter being still incomplete, may perhaps be referred here. In its present 
state it is an internal cast, and is but indifferently figured. 
Loc. Marathon Station, Blinders Biver {The late B. Baintree) ; Blinders Biver, 
seven miles above the same, in dark-drab limestone {B, L. Jack) ; Well, at two hundred 
feet below surface, seven miles east of Mount Cornish Homestead {E. Edkins). 
Inoceeaaius MAEATHOi«'io::fSis, Etheridge. 
Inoceramus marathonensis, Etheridge, Quart. Journ. Oeol. Soc., 1872, xxviii., p. 343, t. 22, f. 1. 
„ „ Etheridge fil., Journ. R. Soc. N. S. Wales, 1883, xvii., 1st pi., up. fig. 
Sp. Char. Shell elongated and compressed ; umbonal region narrow, acute, and 
tapering; ventral portion of shell much expanded ; concentric plications or undulations 
variable, being alternately broad and narrow, and unequal. {Etheridge^ 
Ohs. In size and shape it somewhat resembles I. annulatus from the White 
Chalk of Westphalia ; but the wnint of the true outer shell prevents our referring it to 
that species, the equidistant lines of grow’th in L. annulatus being characteristic and 
well defined. {Etheridge.) 
This is retained provisionally as a species. The elongated form, and very coarse 
corrugations, with intermediate fine concentric lines appear to distinguish it. If 
Inoceramus Sutherlandi, McCoy, is after the type of I. Ouvitri, the present shell is a 
separate and distinct species, so far as Australian Inoccrami arc concerned. 
Loc. Marathon Station, Blinders Biver {The late B. Baintree) ; Landsborough 
Creek, Thomson Biver {Frof. A. Idversidge — Colin. Sydney University). 
Inoceramus euongatus, Etheridge. 
Inoceramus muUipHcatus, Stoliezka, var. donyatus, Etheridge, Quart. Journ. Geol. Soo., 1872, xxviii., 
p. 343 {excl. ref.), t. 22, f. 2. 
Sp. Char, Shell much elongated, with numerous concentric ribs, which become 
coarser and flatter near the ventral margin ; umbones acute and apparently incurred ; 
whether they approximate or not, we have no means of determining. {Etheridgef) 
