127 



they finally fade away. The anterior whorls are flatly convex, 

 smooth, but with striae of growth. 



Outer lip thin, columella with four oblique, thin, high plaits. 



Dimensions. — Length, 39; breadth, 13; length of aperture 22. 



Locality. — Clayey green sands, Adelaide bore. 



This species has much affinity with V. McCoy ii, but apart 

 from the ornate apical whorls, it is distinguished by its narrower 

 outline and flatter Avhorls. 



14. Voluta polita, spec. nov. Plate il, fig. 7. 



Shell similar to F. McCoy ii., smooth and highly polished, but it 

 is proportionately broader, the whorls more convex, and the pullus 

 is larger, though similar. The columella plaits are five, lamellar, 

 very high, somewhat expanded, incrassated, and reflexed out- 

 wardly. 



Dimensions. — Length, 29; breadth, 13-5; length of aperture, 

 19-5. 



Locality. — Lower beds at Muddy Creek. 



15. Voluta ellipsoidea, Tate. 



Reference. — Gastropods, Part I., plate xiii., fig. 4. [Present 

 description has reference to a larger and perfect specimen, Avhich 

 has been subsequently acquired.] 



Shell narrow, f usif ormly oval ; spire elongate, pullus subcylin- 

 drical of three and a half smooth ivory-white whorls, separated by 

 a deeply impressed suture ; the tip is central, hardly rising above 

 the level of the succeeding turn. 



Whorls four, the first one much narrower than the preceding 

 Avhorl, flat, the rest of the spire whorls very slightly convex, finely 

 sculptured with spiral and transverse strise. 



Last whorl elongate and very little tumid, hardly attenuated 

 at the base. Aperture narrowly oblong, roundly angled behind 

 with a wdde open canal, a little bent to the right and reverted at 

 the front. Outer lip sharp, a little insinuate at the suture, nearly 

 parallel to the axis, slightly incurved medially, patulous at the 

 point. Inner lip slightly convex medially, a little twisted and 

 bent back in front, with four stout distant oblique plaits. 



Dimensions. — Length, 62 ; width, 23 ; length of aperture, 42 ; 

 width, 7 ; height of pullus, 6 ; breadth, 6. 



Locality. — LoAver beds at Muddy Creek. 



IG. Voluta capitata, spec. nov. Plate ii., figs. 2'^—b. 

 Shell fusiform-oval, thick, with a moderately long acuminate 

 spire, ending in a smooth conic pullus of five turns, middle whorls 

 of pullus much wider than the rest, the last whorl much narrowed, 

 suture impressed ; first two whorls channelled at the suture Avith 

 an acute shoulder, the tip is exsert. 



