‘MESOZOIC FOSSILS FROM THE PALMER RIVER, QUEENSLAND. 151 
Some few bifurcate, about from forty to fifty in the last whorl ; 
diameter (taken across from extreme visible edge of last wher), 
103 millim. ; thickness, 17 millim. ; diam. of flexuous cost, from 
5to7; sutures very indistinct, apparently seven, much divided, 
rounded lobes on each side. _ The specific name is derived from 
the elbow-like bead of the ri 
tee eee 
very satisfactory comparison cannot be made, in ne of 
the extent to which the fossil is covered by matrix. Any attempt 
to liberate it only imperilled the whole specimen, as it was 
wisn brittle, so I — been gs ~ leave many points 
acute etphery (2) its broad sigmoid ribs. iron species of 
ammonites have been described from Australis. Four by Moore, 
4 tg nsis, ooret, vad in; A. 
brocchit, Sow. ; A. imacrecophalus, Schloth. None of these have 
any resemblance to this species. In all the shell is not ~ 8 
8 
—9 
aq 
2 
a 
S| 
=v 
A Mr. the almost aniobth shell, with fine ke which 
4 But Biheriage regarded as represented by a variety (A. mitchellt). 
3 this was already described by Professor ner under the 
th Seven ammonites, only two of which can be claimed as nie to 
© Australian deposits. If the present a is distinct it will 
make a third, but I hardly think that it is 
Il loosely and wes 
wr irregulare, n.s. Pl. 8, fig. 9.—-She oosely we 
ng interval. Coste of two sizes, the tuberculate ones lange, 
: <0 apae from one a by simple, narrow, round, undu- 
two ec vary in umber between the "gubercles 
ts species iffer from the typical form of the eet in the 
_o coiling, in which it combines pers = Sealy 
= Fetes, the latter especially, as 
sot plete. The nucleolar portion othe whee 
