166 



5. Pisania brevis, spec. nov. PI. is., fig. 8. 



Shell oratelj conical ; wliorls six, angularl^y convex, a little 

 contracted in front, strongly costated and lirate. 



Costre narrow, acutely rounded, distant, slightly oblique, 

 about ten to a whorl, more or less crenulated by the lirse. Lir8& 

 on the body whorl alternately stout and slender, two very 

 stout ones on the angulation ; suture margined by two con- 

 fluent lirae. 



Aperture somewhat varicosely dilated ; outer lip lirate 

 within ; columella truncated by an oblique fold behind, which 

 is denticulated ; canal short, stout, slightly oblique. 



Length, 10 ; breadth, 55 ; length of aperture and canal, 6. 



Localitij. — Upper and lower beds at Muddy Creek. 



GeXUS CA^'THARrS. 

 1. Cantharus varicosus, 8-pec. nov. Plate viii., fig. 10. 



Shell ovate, subf usiform, whorls five and a half, flatly con- 

 vex, variced, of rapid increase, apex of one and a half small 

 smooth rounded whorls, the tip immersed. 



Posterior whorls spirall}' deeply grooved ; anterior whorls 

 with thick spiral ridges, about eight on the penultimate whorl, 

 broken up into thick, elongate, regularly disposed granules, 

 with a slender thread in the narrow interspaces ; on the body 

 whorl the granulation is not so regular, and the interstitial 

 thread is conspicuous. Varices five. 



Aperture oblong ; outer lip varicosely dilated, margin sharp^ 

 with a thick, stoutly denticulate band within, the front sharply 

 curved to the short, sinistrally curved, emarginate beak ; inner 

 lip and pillar with a thin porcellanous coat tuberculate all over. 



Length, 17"5 ; breadth, 9'5 ; length of aperture and canal, 12. 



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



GrE]!«^TJS PhOS. 

 SYNOPSIS OF SPECIES. 



Apex acutely conical. 



Whorls convex, a little flatted behind. 



1. P. iardicrescens. 

 Apex subcylindrical or turbinate. 

 Whorls convex, not shouldered. 



Costse slender, lira? strong. 2. P. lircecostatus, 



CostcT feeble, lir?e faint. 3. P. cominelloides. 



CostcT and lir?e strong. 4. P. Gregsoni. 



Whorls shouldered and tuberculated. 



5. P. tiiberculatiis. 

 Apex mamillate, obtuse. 



Whorls tabulated, aperture variced. 6. P. variciferus. 



i 



