1887. — No record appears to exist ot any collecting operation, or even 
observations of a Pabeontological nature ])etweon 1883 and 1887. In the 
latter year appeared the second edition of the late Mr. C. S. AVilkinson’s 
“Notes on the Gieology of New South Mhdes.” ^ The following Cretaceous 
species are therein mentioned : — MocUoIa {Myliliis) Jlagelliferus, Eorhes,“ 
obtained by Mr. James AA’ilson froin calcareous greensand, at a depth of four 
hundred and eighty feet in a well-boring on Dunlop Holding, Darling Iliver ; 
and Ammonites Daintrcci, Etheridge,^ with Bclemnites, Cylherea, and Acicula 
from well-sinkings between the Mount Poole Gold-field and the Queensland 
border, obtained Ijy Messrs. Adckery and Slec. 
1893. In 1893, Mr. .1. B. Jaquet, of the New South AVales Geological 
Survey, furnished a “ Report on the M^hite Cliffs Opal-field.”^ The beds in 
which the opal is found arc referred to the Desert Sandstone Series of Dain- 
tree, and the replacement of the remains of Mollusca and other organisms by 
opal is referred to. Belcmnites w^erc found in the kaolin beds in situ. 
Amongst other forms the opal occurs as : — 
1. Opaline shells and pseudomorphs, probably after gypsiun. 
2. Wood opal. 
The late Prof. M". .1. Stephens exhibited before the Linnean Society of 
New South MMles, wood obtained from a well sinking on the Dunlop Holding, 
at a depth of three hundred feet, evidently in the Lower Cretaceous.*' 
1894. — The only record of a Poraminifer in our Cretaceous beds, known 
to me, was made by the llcv. llowcliin, who, in his “ Census of the 
Possil Poraminifera of Australia,” mentions the discovery of Bigenerinu 
nodosaria, D’Orb., in a small sample of bore material from the MTlcannia 
Bore. It is “ one of the most characteristic of the Australian Cretaceous 
foraniinifera.” 
1895. — Dr. .1. C. Cox exhibited to the Linnean Society of New South 
MMles an opalised shell from M^hite Cliffs, considered by him to be a Mactrad 
It may possibly be a species of the new genus described in this Memoir as 
Cyrenopsis. 
* Min. Proilucte N. S. Wales, 2iiil Edit., 1887, I'p. 78-79. 
^ Modiola chinlopansis, niihi. 
2 Haploccras Dainlreei, mihi. 
^ Ann. Kept. Dept. Mines and Agrie. N. S. Wales for 1892 (1893), pp. MO-M2. 
5 Proc. Linn. Soc. N. S. Wale.s, 1883, VIII, Pt. ‘2, p. 281. 
Proc. Austr. Assoc. Adv. Sci. for 1893 (189-1), V, p. 303. 
’’ Proc. Linn. Soc. N. S. Wales, ISO.!, IX (2), I’t. 3, ]), 467. 
