Au'P. VI. — On Some Australian Tertiary Pleurotomarias. 



By G. B. PRITCHARD, 



Lectiu-er on Geology, etc.. Working Men's College, Melboixrne. 



(With Plates XIII., XIV.). 

 [Read 14th May, 1903.] 



I. — Pleupotomaria teptiaria, McCoy. (PI. XIV., Figs. 1-4). 



The first species of the genus Pleurotoniaria described from 

 Australian Tertiary deposits is that dealt with by the hite Sir 

 r. McCoy, under the name of P. tertiaria/ in 1876, and is 

 indicated as, " Rare, in a hard, pink and yellowish limestone, 



like lithographic stone, on the east bank of the 



Moorabool River, near .Maude." This species still remains a 

 rare form, and only imperfect specimens are usually obtained. 

 The range of the species may, however, be extended much 

 further down the valley than the locality indicated by McCoy, 

 the section in soft polyzoal and other limestones below the old 

 Clyde Mill, and on the opposite side of the river to the State 

 School, having yielded fair specimens. These deposits along the 

 valley were originally referred to by McCoy as Miocene," and 

 consequently the Geological Survey mapped them as such.^ This 

 was subsequently followed V)y Dr. 11. Woodward in his paper on 

 Recent and Fossil Pleurotomariae,'' and by later writers. This 

 horizon has been referred to as the Upper Maude Beds,'^ and is 

 probably Eocene, the palaeontological evidence clearly requiring 

 a greater antiquity than Miocene.'' 



1 Prodronius of the Palaeontology of Victoria, Decade III., pp. 23, 24, i>\. xxv., flgs. 1, 

 la, 16, 1876. 



2 Intercol. E.xhib. Essays, 1866-67, No. 7. Recent Zool. and Palaeontology of Vic, pp. 

 16-19. Also Selwyn, Id., No. 3, Phys. Geog., Geol., and Min. of Vic, pp. 22, 23. Also 

 Prod. Pal. Vic, Dee. III., p. 23. 



3 Geological Survey (Quarter-sheet, No. 19, S.W., Wilkinson and Murray, 1805. 



4 Geol. Mag., n.s., Dec III., vol. ii., No. 10, Oct., 1885, p. 434. 



5 Proc Hoy. Soc Vic, vol. vii., ii.s., pp. 184, 185, 1895. 



6 A.A.A.S., Adelaide, 1893, vol. v., pp. 338-343. Proc. Key. Soc \'ic., vol. vii., n.s., pp. 

 186-188. Trans. Koy. Soc. S.A., vol. xix., pt. i., p. 121, 1895. A.A.A.8., Brisbane, 189.') 

 vol. vi., pp. 348-361. 



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