98 Messrs. J. C. Melvill and J. H. Ponsonby on 



obtusn, albo-hyalina, vol pallide straminea; anfractibus 8, parura 

 Tontricosis, Lcnssirais, striis lougitudinalibus fere evanidis, iion- 

 nisi apud basin (vol, in uno specimine, obscurissime juxta 

 Buturas) ; apertura ovata ; peristomate albo, nitido, sex plicis 

 detitibusvc iustrueto : plica parietali conspicua, dente ad sinistram 

 minuto addito, dentibus labialibus duobus, inforinre forti, bifido, 

 supcriorc minuto, dente basali bene defiuito, columcUari magna, 

 baud profunde intraute. 

 Long. 5, lat. 2 mm. 



Hab. Port Shepstone (Durnup). 



A remarkable £'Hwea,\vitliout a near ally in the disposition of 

 its very elaborate peristomatal processes. The shell is smooth, 

 shininp:, obloiig-ovate, remarkably obtuse, with only occa- 

 sional faint signs of striation ; there exists a small parietal 

 tooth near the strong deep-seated ])lait; the labial teeth are 

 two in number, the lower being very well defined and bifid ; 

 the basal and columellar teeth are likewise conspicuous. 



Natalina arguta *, sp. n. (PI. YI. fig. 8.) 



N. testa profunde umbilieata, Irete rufo-brunnea, depresso-orbiculari, 

 undique arete longitudinaliter striata, apud basin nitidiore ; an- 

 fractibus ad 5, ventricosulis, ultimo magno ; apertura rot.undo- 

 lunari ; peristomate, prgecipue apud regionem columellarem, 

 paullum reflexo. 



Alt. 14, diam, 21 mm. 



Hah. East London (Burnup). 



Allied to i\^ Trimeni^ M. & P., that species being more 

 globose, of olivaceous rather than rufous-brown hue, not so 

 regularly striate throughout, the base being smoother and far 

 more shining, the umbilicus narrow, and aperture slightly 

 oblique. N. arguta, in brief, is a brighter-coloured and 

 liandsomer form in every way. 



Natalina insignis, sp. n. (PI. YI. fig. 9.) 



N. testa magna, depresso-globosa, profunde scd anguste umbilieata, 

 sordide olivacea ; anfractibus ad 5, convexiusculis, longitudinaliter 

 rudi-striatis, striis irregularibus, subtus apud basin nitidam fere 

 evanidis; apertura rotundo-lunari ; peristomate apud marginera 

 paullum incrassato, ad umbilicum triangulatim reflexo. 



Alt. 23, diam. 30 mm. (sp. maj.). 



Hub. Teafuntein, Grahamstown. 



May be compared with N. eumacta, M. & P., a more 



♦ Argutux, clear, distinct. 



