154 



Axis. .3 : diam. 6 millim. Inhabits Simon's Bay, Cape Good Hope. 

 W. S. 

 Much like M. dihcta A. Ad. 



Margarita albula. T. parva, tenuis, ovato-turbinata, palHde" 

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

 rotundatis, ad peripberiam obtusis ; basi convexo, ante perforato : 

 apertura subcircularis ; peritremate acuto, fere continuo. Axis, ."> \ 

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



Much like an overgrown M. 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 MU8TELINA. T. minuta, tenuis, globoso-eonica, infra 

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

 ventricosis; peripheri§ obtuse angulata; basi rotundato late perforato: 

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

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



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

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

 clivibus, prope suturam excavatis ; area umbilical! lira in labro 

 desinente cincta: oblique et arete perforata: apertura rotundata 

 quodammodo transversa ; columella cylindrical umbiUco 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 fuscq et all>o articulatis cinctis; basi rotundato, late perforato, 

 concentric^ sulcato et artieulato: apertura rotundato-ovata ; labro 

 tenui ; columella incrassata, nacrea, antice euspidata. Axis. 1 ; 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 apertures protrusus; lobi cervicales valde fimbriati; 

 solea elongata, lanceolata, anguli anteriores valde protracti ; cirrhi 

 laterales atrimque quinque quorum postici mult6 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. 5 convexiusculis ad peripberiam obtusis; sutura profunda; basi 



