154 



Axis. 5 ; diam. 6 millim. Inhabits Simon's Bav, Cape Good Hope. 



vv. s. 



Much like M. dilecta A. Ad. 



Margarita albula. T. parva, tenuis, ovato-turbinata, pallide 

 grisea, striis volventibus tenuibus insculpta ; anfr. 4 cito crescentibus, 

 rotundatis, ad peripheriam obtusis ; basi convexo, arete perforate : 

 apertura subcircularis ; peritremate acuto, fere continuo. Axis, 5 ; 

 diam. 8 millim. Inhabits Arctic Seas. W. S. 



Much like an overgrown 31. arctica, but it 'is covered with an 

 opaque calcareous crust ; the suture is less impressed ; the umbilicus 

 smaller, and it is everywhere spirally striated. 



Margarita mtjstelina. T. minuta, tenuis, globoso-coniea, infra 

 concentric^ striata, livida albo prope suturam parce strigata ; anfr. 4 

 ventricosis; peripheric obtuse angulata; basi rotundato late perforato : 

 apertura ovata ; columella, tenui, arcuata. Diam. 4 ; axis, 3 -f- millim. 

 Inhabits Hakodadi Bay, at low water. W. S. 



Margarita lexticula. T. minuta, depressa, lenticularis, con- 

 cavo-convexa, lactea, striis tenuissimis ordinatis cincta ; anfr. 4 de- 

 clivibus, prop£ suturam excavatis ; area umbilicali lira, in labro 

 desinente cincta : oblique et arete perforata : apertura rotundata 

 quodammodo transversa ; columella cylindrical umbilico obvia. Axis, 3 ; 

 diam. 5 millim. Sea shore, Loo Choo. W. S. 



This pretty, depressed species may very likely belong to a distinct 

 genus ; but I find no other one which will better receive it. 



Margarita pintado. T. parva, ovato-globosa, depressa, tenuis. 

 cinerea ; anfr. 5 ventricosis juxta suturam planulatis, liris 5 volventi- 

 bus fusco et albo articulatis cinctis; basi rotundato, late perforato, 

 concentric^ sulcato et ai^ticulato : apertura rotundato-ovata; labro 

 tenui ; columella incrassata, nacrea, antice cuspidata. Axis, 4 ; diam. 

 5 millim. Inhabits Simon's Bay, Cape Good Hope, 12 fathoms, 

 sandy. W. S. 



Characters in many respects like those of Monilea, rather than of 

 Margarita. 



Gen. Monilea. Ommatophori extend, liberi ; tubus analis ex 

 angulo postico apertura3 protrusus ; lobi cervicales valde fimbriati ; 

 solea elongata, lanceolata, anguh anteriores valde protracti ; cirrhi 

 laterales utrimque quinque quorum postici multo breviores. 



These characters are drawn from M. nucleses Phil, and have not 

 before been given, the genus having been established upon the shell 

 alone. 



Monilea apicina. T. parva, ovato-conica, tenuis, filis numerosis 

 subequalibus cincta ; apice et flammulis sparsis radiantibus rosaceis ; 

 anfr. .3 convexiusculis ad peripheriam obtusis ; sutura profunda ; basi 



