46 
courses to the apices of the guards, divided by a hue ridge, a feature hardly 
distinguishahle in the type, althougli visible in another of Tate’s South 
Australian specimens. 
I figure an opalised imperfect guard (PL VIII, Fig. 10) in which the 
grooves are not visible with certainty, although I believe the form if clear of 
matrix, and not fractured (naturally), would approximate to that of 13. 
Cemhami, 
Loc. — Croxon’s well, Mount King, Albert District, North-West N. S. 
Wales {^A. Croxon)-, well at a depth of one hundred and hfty feet, two 
hundred and hfty miles from Wilcannia, near the Queensland Border, North- 
M^est N. S. AVales [B. von LendenfeUJ) ; well-sinking, at two hundred and 
fifty feet, thirty miles north of Tibooburra, North-lVest N. S. "Wales {T. IF, 
Commyns). 
ILor . — Lower Cretaceous. 
Loc . — ? Wliite Clift’s Opal-held {F. G. de V. Gvpps). 
llor. — Uj^jier Cretaceous (White Cliffs Opal Series). 
Colin . — Mining and Geological Museum, Sydney ; and Gipps. 
Belemnites, sp. 
(PI. IX, Figs. 3-5.) 
Ohs . — I am very undecided as to the identity of this Belemnite guard. 
The distal portion has the a 2 )pearance of some varieties of B. Canhami, Tate, 
but the proximal strangulated or neck-like portion is a feature departing 
from that typo ; when viewed laterally (Fig. 4) the guard is also seen to be 
somewhat bent. Unfortunately, it is a single specimen, and I think it 
advisable to wait for furthei’ material before making a determination. The 
alveolus, furthermore, is conhned to the end of the strangulated portion, and 
does not extend into the clavate part of the guard, as in B. Canhami. 
There is also a very interesting point in connection with the dorso- 
lateral grooves. They more or less constrict the transverse section at the 
proximal end, as in B. Canhami, and are in the first portion of their course 
straight, gradually curving on to the ventro-lateral surface at a little less 
than half the length of the guard, but do not ultimately quite reach the apex. 
