SMITH: MARINE SHELLS FROM PORT ALFRED. 31 



Mitpomorpha volva, Soweiby, var. 

 PL ii, fig. 13. 

 Testa ovato-fusiforniis, supra i)allide fuscescens, infra albida, circa medium 

 anfract. ultimi fusco notata vel zonata ; spira conica, ad apicem mamillata ; 

 anfractus 6, superiores duo laeves, rotundati, caeteri spiraliter lirati (liris in 

 anfr. penult 4, infimo caeteris majori, albo, fusco picto, in ultimo circiter 15), 

 in interstitiis longitudinaliter tenuiter striati : apertura angusta, longit. totius 

 I vix aequans ; labrum tenue, vix incrassatum et supra inconspicue sinuatum; 

 columella rectiuscula, laevis, in medio obsolete incisa. 



Longit. 7.3 millim., diam. 3; apertura 3.5 millim. longa, i lata 



At once recognised by its spiral sculpture and fusiformly ovate form. 

 The whitish lira spotted with brown round the middle of the body-whoil, 

 passes up the spire above the suture and is rather thicker than the rest. The 

 specimens differ somewhat in colour, being of a rich brown tint, excepting 

 the upper part of the whorls which is wh'te with a few brown spots. 



This variety differs from the type in colour and the stronger lirae. The 

 typical form is uniformly very light brown, although described as white. It 

 usually has five lirae on the penultimate whorl, whereas there are only four 

 in the present variet}'. 



Marginella punetiiincat<i, Smiih. 



Two specimens differing somewhat from the type in colour. They are 

 dirty whitish with slender brown lines, which are indistinctly dotted as in 

 the normal form. The lower part of the columella is more or less stained 

 with olive brown. 



Maicginella munda, n. ^p. 

 PL ii, fig. 14. 

 Testa parva, fusiformis, alba, lineis angustis rosaceis subundulatis picta ; 

 anfractus 4—5 leviter convexi, sutura obliqua sejuncti ; labrum mediocriter 

 incrassatum, album, ad extremitatem posticam roseo maculatum ; columella 

 infra callo albo reflexo induta, quadriplicata. 



Longit. 7 millim., diam. 3.3. 



A small species characterised by its fusiform shape and style of colour- 

 ation. 



Marginella pura, n. ^-p. 

 PL ii, fig. 18. 

 Testa M. laetralfei similis, sed duplo major, antice minus contracta. 



Longit. 6 millim., diam. 3.75. 



This species quoted by Mr. Sowerby (Marine Shells S. x'lfrica, p. 20) 

 as the M. mefcal/ei of Angas, differs in size and shape. The Port Jackson 

 shell is only 4 millim. in length, 2.5 in diameter, and is more contracted 

 anteriorly. It is also not so pure white as the present .species. Both have 

 four columellar plaits. I cannot separate M. mefcal/ei and M. orhracea, 

 both of Angas, and both from New South Wales. 



