93 



M. eburnea of the Paris basin, which has however a smooth lip. The 

 shell varies much in its size ; the dimensions of extreme forms from 

 Muddy Creek are 





Length "034 



Breadth 0.16 inch 





" 0-19 



"- 012 The Aldinga specimens 



are stouter 



0-29 



0-18 



8. — Marginella Strombiformis (T. Woods), 

 ioc. cit., p. 109. 



" Shell small, solid, smooth, shining, ovate, narrowed anteriorly, 

 spire short obtuse, whorls four, rounded ; body whorl obscurely longi- 

 tudinally plicate below the suture ; columella anteriorly obliquely some- 

 what coarsely quadriplicate ; aperture narrow, curved, posteriorly 

 emarginate, outer lip conspicuously thickened and produced posteriorly, 

 finely tuberculately dentate within. Length, -275 ; breadth. -12 inch. 



Not unlike a minute Strombus viewed from above owing to the pro- 

 duced lip ; it is nearest in form to the W. Indian M. margueriia, Kiener, 

 but that is a somewhat larger and more angular shell." — (Tenison 

 Woods). 



Locality and Horizon. — Miocene, Table Cape {Johnston.) 



9. — Marginella mictjla (new species). 

 Shell minute, milk-white smooth, shining, conically ovate ; spire 

 very small obtuse ; body whorl gibbous over the suture and constrictedly 

 attenuated anteriorly ; outer lip produced posteriorly slightly thickene ; 

 and minutely denticulated ; aperture wide, curved, posteriorly emarginated 

 columella four-plaited, plaits distant. Length '11, breadth '085 inch. 



Locality and Horizon. — Miocene — Muddy Creek, Victoria. (Tate) ; 

 many examples. 



M. micula is near in form to the W. African M. vitrea (Hinds) but 

 has a smaller spire and is more attenuated ; it, moreover, belongs to a 

 different section of the genus. So much as M. vitrea differs in form from 

 M- murguerita, so does M. micula differ from M. strombiformis. 



10. — Marginella inermis (new species). 



Shell ovate to somewhat pear-shaped, attenuated anteriorly, smooth 

 and shining, spire very short; aperture oblong, strongly arched posteriorly ; 

 outer lip slightly variced, edge thin and inconspicuously denticulated ; 

 columella quadriplicate. Length, \ ; breadth, j-inch. 



