Victorian Fossils, Part XIX. 83 



Observations. — This shell was described by Etheridge from the 

 Wellington Caves, New South Wales, and recorded as of Siluro- 

 Devonian age. 



The species is not uncommon in the Yeringian series of Victoria. 

 As far back as 1902 I identified it in the Museum collection. Owing 

 to the overlapping of the locality numbers used on the early 

 Victorian Geological Survey specimens, this species was erroneously 

 recorded in my list of Silurian Fossils of Victoria, ^ as from 

 ■"Anderson's Creek," but which should read "Police Paddock, 

 Kilmore," a locality that has yielded a number of Yeringian species. 



Occurrence. — Silurian (Yeringian). In bi-own, sandy mudstune, 

 Police Paddock, Kilmore, G.S.V. Bb 22. Also a form with flatter 

 whorls, but evidently belonging to the same species; in similar 

 rock, Eraser's or No. 3 Creek, Springfield, G.S.V. Bb 25. 



Mourlonia suhaequilatera^ sp. nov. (Plate III., Figs. 18, 19). 



Descripfio?}. — Shell heliciform. Whorls six or seven, convex, 

 sutures distinct. Slit-band slightly above the median line, narrow, 

 bordered by prominent threads above and below. Whorls oi-na- 

 m.ented with strong, raised costae. above arcuate and inclined 

 forward to the mouth, and vertically arcuate below. Area between 

 costae finely striate, at right angles to them. Spire low, with 

 pointed apex. Base in the holotype encrusted, but with indication 

 of a wide umbilicus. 



Dime?isions. — Greatest breadth of shell about 26 mm. Height, 

 from base to apex, 15.5 mm. 



Ob ser vat io7is.— The above species appears to belong to de 

 Koninck's genus Mourlonia, which is a conical or discoidal pleuro- 

 tomarid with distinct umbilicus. A closely allied species i's Mour- 

 lonia aequilatera, Wahlenberg sp.,- a well-distributed Upper Silu- 

 rian fossil in Europe. The Australian species differs in having the 

 slit-band superior to the median line, and in the costae being more 

 pronounced and intercancellate. 



Occurrence. — Silurian (Yeringian). In limestone. Cave Hill, 

 Lilydale. Collected by the Rev. A. W. Cresswell, M.A. 



Genus Phanepotrema, Fischer. 

 Phanerotrema australis, R. Etheridge fil. (Plate III., fig. 25). 

 Phanerofrema australis, R. Etheridge, jnr., 1891. Rec. Austr. 

 'Mus., vol I., No. 7, p. 128, pi. XIX., figs. 4, 5. 



1 See " Plearotomaria ( .Moiirlonia) duni, Eth. fil." Rep. Austr. Assoc. Adv. Sci., Melbourne 

 Mtg., 1913, vol. xiv.. p. 218. 



2 Helicites aequilatera, Wahlenberg. Petrifacta Svecana Telluris, 1818, p. 73. Pleuroto- 

 ■tnaria aeqiiUatera, Wahl. sp. Lindstrbm, Kongl. Svenska Vet.-Akad. Handl., Bd. xix., No. 6. 1SS4, 

 (P. Ill, pi. ix., figs. 20-29. 



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