TERTIARY MOLLTTSCA OF VICTORIA. 
Dimensions. — Holotype. Length, 15 mm. ; breadth, 5 mm. ; length of 
aperture and canal, 7 mm. 
Observations . — This species resembles somewhat the living 
Guraleus cuspis (Sowerby) as figured by W. L. May (Illustrated 
Index of Tasmanian Shells, 1923). 
Localities. — Balcombe Bay, Mornington. Spoil heap of brown coal mine, 
Altona, near Williamstown. 
Geological Horizon. — Balcombian (Oligocene). 
Family TROCHIDAE Adams 1858. 
Genus CALLIOSTOMA Swainson 1840. 
Calliostoma balcombensis, sp. nov. 
Plate XIX, figs. 6, 6a. 
Holotype. Reg. No. 13694. Balcombe Bay, Mornington. 
Description. — Shell trochiform, of five convex whorls, exclusive of apex- 
Protoconch, small, of one-and-a-half turns, tip enrolled at right angles to 
axis of shell. Whorls spirally lirate throughout, five on penultimate whorl, 
lirae granulose, with an intermediate fine thread. Suture well impressed. 
Body whorl ventricose ; base convex, lirate but less granulose than on whorls, 
about eight lirae on base. Aperture subquadrate, pearly within ; outer lip 
thin, crenulate ; columella excavated, slightly reflexed. 
Dimensions. — Holotype. Length, 9 mm. ; breadth, 7 mm. 
Observations. — This species is fairly common at Balcombe Bay. 
Locality. — Balcombe Bay, Mornington. 
Geological Horizon. — Balcombian (Oligocene). 
ACKNOWLEDGMENTS. 
The author desires to express his thanks to the Director 
of the National Museum (Mr. D. J. Mahony) for assistance in 
revisions, and to the Palaeontologist (Mr. R. A. Keble) for access 
to the Museum collections for purposes of comparison. Also 
his indebtedness to Mr. F. A. Singleton of the Geology Depart- 
ment (Melbourne University), for many valuable suggestions. 
Plate XIX. 
Figs, la, b. 
Figs. 2a, b. 
Figs. 3a, b. 
Figs. 4a, b. 
Figs. 5a, b. 
Figs. 6a, b. 
Salaputium corioensis, sp. nov. ; holotype. xl.5. 
Turris janjukiensis, sp. nov. ; holotype. xl.5. 
Gemmula gellibrandensis, sp. nov. ; holotype. x 1.5. 
Etrema morningtonensis, sp. nov. ; holotype. X 3. 
Guraleus cuspidatus, sp. nov. ; holotype. x 3. 
Calliostoma balcombensis, sp. nov. ; holotype. x 3. 
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