375 
K. Ward the Caroline Creek beds are said to ‘‘have been 
definitely referred to the Upper Cambrian.” ©) 
1884.—Dr. Henry Woodward described ? two imperfect 
cephalons from the Parara Limestone as Dolichometopus tatei 
and Conocephalites australis; he ascribed«to them a Lower 
Silurian age. re-examination of these specimens is neces- 
sary before it is practicable to say what they "si 
+ 
1888.—During this year I received Mr. 
Howchin an Ardrossan cephalon, which I PI HV, to Ptycho- 
paria as P. howchini.(9 
1890.—The first Cambrian aei collected in North- 
western Australia were obtained by . T. Hardman,(? 
but for many years the exact source a these fossils was in 
doubt. This uncertainty has now been satisfactorily set at 
rest by a very careful ao painstaken analysis of Hardman’s 
reports and maps by Mr. L. Glauert, whose determinations 
are here adopted. 
Hardman’s fossils from the Ord River were first critically 
examined by myself’ at the British Museum in 1885, when I 
attached MS. names to several I intended to describe. Cir- 
cumstances prevented this, but Mr. vH tz Foord 0? took up 
the work, and honoured me by adopting my MS. names. 
One, a Trilobite, was named Olenellus HE 
e Ord River limestones are for the greater part hard 
and be: rarely massive, usually grey in colour, sometimes 
sandy or magnesian, and seldom fossiliferous.0? But in 
places where the rock is fossil- bearing, it is crammed with the 
shells of a small supposed Pteropod ( Salterella hardmani) 
and innumerable pieces and bits of Trilobites. From the pre- 
valence of the little shells I have been in the habit of referring 
to a ie rock as the ‘‘Salterella Limestone." 
6 Wa rdi “The Geology of Soy gra the Pre-Cambrian," 
Papers and Proc. Roy. Soc. Ta m. 1909, p. 128. 
(7) Woodward : Geol. Mag., i. (3), 1594, p. 342, pl. xi., figs. 
2a, b, and 3. 
L 0 Btheridge Trans. Roy. Soc. S. Austr., xxii., 1898, p. 1, 
pi. iv., s 
e fach eae Mag., vii. (3), 1 . 99. 
(10) Bnet: Rec. W. Austr. od s pet Gallery, i., pt. ii., 
1912, p. 66. 
ji Foord: Geol. Mag., vii. (3), 1890, p. 99, pl. iv., figs. 
3. 
12 Hardman : ‘2nd Rep. Geol. Eiatadiy Dat. i W. Austr.," 
W. Austr. Parl. Pure No. 34, 1885, p. 17, par. 124. 
