200 



Outer lip moderately eciirved medially; the anal notch is broad 

 and shallow. 



DbnensioiLS. — Length, 60 ; greatest width, 24 ; length of aper- 

 ture, 50. 



Localities. — Muddy Creek ; River Murray Cliffs ; Spring 

 Creek, near Geelong ; Cheltenham (doubtful identifications). 



10. Conus Hamiltonensis, ■^pec. nov. 



Similar to C, extenuatus, and perliaps only a variety, thougli 

 not yet connected by intermediate forms ; it differs by being pro- 

 portionately broader, by the absence of nodulations and a keel on 

 the earlier whorls, and by the more numerous spiral threads 

 (about eleven) upon the spire-whorls. 



The penultimate and body-whorl are obtusely keeled and nodu- 

 late. The median area of the body-whorl is smooth or obsoletely 

 spiral-lirate, not sulcate. 



Dimensions. — Length, 32-5; greatest breadth, 14; length of 

 aperture, 25. 



Locality. — Lower beds at Muddy Creek. 



11. Conus Murravianus, ■^j^'ec. nov. 



Shell narrowly biconical, more than twice as long as wide ; 

 spire scalar, gradually tapering to the cylindroid pullus of three 

 and a-half smooth convex whorls. 



Spire-whorls six, suture concealed by reflection of their posterior 

 margin, bluntly angled a little in front of the middle, the longer 

 backward-sloping area slightly concave; ornamented with close- 

 set sigmoid striae and obsolete spiral thi-eads. The posterior-half 

 of the tirst whorl is slightly costated. 



Body-whorl broadly lanceolate in outline and narrowly trun- 

 cate at the front, roundly angular at the pei'iphery with a con- 

 cave shoulder, which is obsoletely lirate ; whole surface marked 

 with fine sigmoidal growth-lines, and at the front by encircling ridges. 



Outer lip with a shallow, obliquely-cut, notch at the posterior 

 angle, thence with a gentle outward curve to the middle, and 

 more rapidly declining to the front. 



Dimensions. — Length, 61 ; greatest w^idth, 26 ; length of 

 aperture, 46. 



Locality. — Calciferous sandstones of the River Murray Cliffs 

 near Morgan. 



This species comes near to C. gradatulus, Sow., and differs so 

 far as one can judge by the figure, by the ante-medial position of 

 the blunter keel on the spire-whorls. 



12. Conus (Conorbis) atraetoides, -^pec. nov. 

 Shell ovately fusiform, biconic ; test moderately thick ; surface 

 spirally furrowed, smooth and shining. Spire regularly conical, 



