375 



K. Ward the Caroline Creek beds are said to "have been 

 definitely referred to the Upper Cambrian." < 6 > 



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. A re-examination of these specimens is neces- 

 sary before it is practicable to say what they may be. 



1888. — During this year I received from Mr. W. 

 Howchin an Ardrossan cephalon, which I referred to Ptycho- 

 paria as P. howchini.^ 



1890. — The first Cambrian fossils collected in North- 

 western Australia were obtained by Mr. E. T. Hardman,< 9) ' 

 but for many years the exact source of these fossils was in 

 doubt. This uncertainty has now been satisfactorily set at 

 rest by a very careful and painstaken analysis of Hardman's 

 reports and maps by Mr. L. Glauert/ 10 ) 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. A. S. FoorddD took up 

 the work, and honoured me by adopting my MS. names. 

 One, a Trilobite, was named Olenellus forresti. 



The Ord River limestones are for the greater part hard 

 and flaggy, rarely massive, usually grey in colour, sometimes 

 sandy or magnesian, and seldom fossiliferous.( 12 ^ 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 this rock as the "Salterella Limestone." 



(6) Ward : "The Geology of Tasmania: the Pre-Cambrian,"" 

 Papers and Proc. Roy. Soc. Tas., 1909, p. 128. 



(7) Woodward: Geol. Mag., i. (3), 1884, p. 342, pi. xi., figs. 

 2a, b, and 3. 



(8) Etheridge : Trans. Roy. Soc. S. Austr., xxii., 1898. p. 1,. 

 pi. iv., figs. 1-3. 



(9)Foord: Geol. Mag., vii. (3), 1890. p. 99. 



(lO)Glauert: Rec. W. Austr. Mus. and Art Gallery, i., pt. ii., 

 1912, p. 66.. 



ai)Foord: Geol. Mag., vii. (3), 1890, p. 99, pi. iv., figs. 

 2a, 6, 3. 



(12) Hardman : "2nd Rep. Geol. Kimberley Dist. W. Austr. ,"" 

 W. Austr. Pari. Papers, No. 34, 1885, p. 17, par. 124. 



