11 
before reaching their primaxils. In my former description I regarded the 
thirteenth primibrach as primaxil, possibly I may have erred in so doing, by 
including a fracture between two ossicles as a gap from which one was 
supposed to have fallen. 
In the angle between two of the primibraehialia are a number of small 
joints in two lines, side by side. One line numbers about fifteen and the 
other four. The oval, or almost round section, and small central canal lead 
me to regard these as displaced cirri. If such be their nature, the stem of 
J. australis, must have given support to fairly long organs of this nature. 
The specimen is wholly converted into translucent opal, blue, green, 
or purple in colour, with here and there slight traces of precious or fire opal. 
Log. — White Cliffs, near Wilcannia, north-west N. S. Wales [Warden 
W. L. 3Iackenzie). 
Hor . — Upper Cretaceous (White Cliffs Opal Series). 
Coll. — Mining and Geological Museum, Sydney. 
A few other Crinoid remains have been met with in the same beds. 
The first is a portion of an arm consisting of a number of indifferently 
preserved ossicles with pinnules attached to at least six of them. The latter 
are composed of short joints, triangular in section (PI. Ill, Pig. 10), 
The second specimen is another portion of an arm with an axillare 
(PI. Ill, Pig. 11). 
The third instance is again a portion of an arm consisting of many 
joints, with the remains oF at least ten pinnules attached (PI. VI, Pig. 7). 
All three specimens are converted into common opaque white opal. 
Loo. — "White Cliffs, near Wilcannia, north-west N. S. IVales. [ F. G. 
de V. Gipps and C. Cullen.) 
llor . — Upper Cretaceous (White Cliffs Opal Deposit). 
Coll. — Mining and Geological Museum, Sydney ; and Gipps. 
