112 



The transverse ornament consists of about 12 sliarj^ly- 

 rounded costa^ on each whorl and interstitial threads and striie. 

 On the body whorl the costsD are absent for some distance be- 

 hind the aperture, and with the marginal varix are about seven 

 in number. The spiral ornament consists of unequal threads, 

 the more prominent of which rise into low blunt granulations 

 in crossing the ribs; there are about five lirse on the penultimate 

 w^horl, of which four are more j^rominent than the rest. There 

 are no proper varices except the broadly dilated one which 

 margins the aperture. 



Aperture oval, entire ; outer lip thin in front of varix, four or 

 five dentate within ; inner lip thin, erect, smooth wdthin. Canal 

 narrow, bent a little to the left and slightly reverted, nearly as 

 long as the aperture, almost closed. 



Length, 9 ; breadth, 3'5 ; length of aperture and canal, 4*5. 



Locality. — Clayey sands with green grains, Adelaide bore. 

 (Sixteen examples.) 



This species may not be a Troplion. The thin outer lip, not 

 widely margined, removes it from Murex. 



7. Trophon mangelioides, spec. iiov. Plate x., fig. 11. 



Shell thin, ovately fusiform, with a high spire ending in a 

 blunt mamillary apex of two smooth whorls. "Whorls fom% 

 .exclusive of the apical ones, convex, but somewhat depressed 

 round the upper part ; the last somewhat tumid, with a rounded 

 attenuated base, produced into a rather wide, long, twisted 

 canal. The transverse ornament consists of about 12 stout^ 

 rounded, oblique costse on each w^horl ; and the spiral ornament 

 of equal and equidistant thin, elevated ridges, which are slightly 

 thickened on the transverse ribs ; there are about ten on the 

 penultimate whorl, and those on the anterior part of the body 

 whorl are broken up into granules. 



Aperture elongate-oval ; canal broad, twisted, and slightly 

 reverted. 



Length, 7'5 ; breadth, 3*75 ; length of aperture and canal, 

 4-5. 



Locality. — Gastropod-bed of the Eiver Murray Cliffs, near 

 Morgan. 



8. Trophon anceps, spec. nov. Plate ix., fig. 6. 

 Shell stout, oblong, biconicai, with a high, subgradated spire. 

 "Whorls not less than five, posteriorly angulated and narrowly 

 bicarinate in front ; last whorl convex, with about 12 rounded 

 costa, encircled with about six principal lira*, which are cancel- 

 lated with imbricating lamellae. Aperture oval ; outer lip 

 regularly arched, its margin thin and wavy ; canal short, some- 

 what compressed. 



