156 



Columella with a slight twist at tlie front, and with three distinct 

 folds above it. 



Dimensions. — Length, 13-5 ; breadth, 7; length of aperture, 7. 



Localities. — Lower beds at Muddy Creek. Calciferous sand- 

 stone, River Murray Clifis, near Morgan. 



8. Cancellaria ptychotropis, spec. nov>. Plate ix , fig. 5. 



Shell broadly ovate, similar to C. gradata, but the spiral lirse 

 and transverse threads are fewer and more distant, and the pos- 

 terior area of the whorls is without a spiral thread, whilst the 

 \ivi\d are simply crenulated and not tuberculated. 



Dimensions. — Length, 6*25; breadth, 3-5; length of aperture, 

 3-5. 



Locality. — Turritella-clays at Blanche Point, Aldinga Bay. 



9. Cancellaria turriculata, spec. nov. Plate x., fig. 14. 



Shell oval-turreted, carinate, rising in high narrow steps, end- 

 ing in a broad, blunt, conical pullus. Whorls four, excluding 

 pullus, narrowly flattened above, of regular increase ; ornamented 

 with sub-acute, distant, slightly curved costse (about 11 on the 

 penultimate), which are tuberculosely thickened at the keel, and 

 with slender spiral threads in front of the keel (about six on 

 penultimate whorl). 



Last Avhorl narrow, with an elongate convex obtuse base ; 

 costate and lirate ; aperture elliptical, roundly angled at the keel ; 

 columella with two small plaits. 



Dime7isions. — Length, 5-75; breadth, 2*5; length of aperture, 2. 



Localities. — Turritella-clays, Blanche Point, Aldinga Bay; 

 clayey green-sands, Adelaide-bore. 



10. Cancellaria Wannonesis, spec. nov. Plate viii., fig. 11. 



Shell stout, fusiformly ovate, ventricose; spire sharply acumi- 

 nate, ending in a sub-cylindric pullus of two and a half turns. 

 Whorls 4, excluding pullus, flatly convex posteriorly, then regu- 

 larly rounded to the front ; strongly ribbed and spirally lirate. 



Last Avhorl with about 10 to 12, narrowly rounded, elevated, 

 obliquely arched ribs, most prominently elevated in the median 

 portion of the whorl, becoming obsolete at the front ; costa? ser- 

 rately crenulated by numerous spiral angular lir?e, alternately 

 large and small ; the lira? somewhat rugulose on the edge by the 

 crossing of transverse stri» and folds of growth. 



Aperture broadly ovate, rounded behind and rather truncated 

 in front ; outer lip arcuate, somewhat effuse anteriorly, its edge 

 sharp and obscurely crenulate. Columella nearly straight, with 

 three plaits, the posterior of which is the stoutest ; in senile 

 examples a fourth plait is interposed between the second and 



