384 



Differing from M. caruleacens in the spire being more produced 

 and in the colouring, which is buff, with obscure purplish bands. 



41. Marginella cincta (pi. lxxvii. f. 165, 166.), Kiener, 

 Sp. gen. coq. viv., p. 21. 



M. sub-ovali, postice sub-angulata, varice tumido, aurantiaco 

 latera spiram et terminum anticum colligente ; spira producta, 

 anfractibus rotundatis ; apertura angusta ; columella callosa, late 

 expansa, plicis quatuor, quarum duabus anticis incrassatis, labio 

 externo lsevi, crasso, postice emarginato. 



More angular than M. bivaricosa, encircled with a bright orange 

 callous margin, which surrounds the spire and . is not doubled on 

 the right side. 



Mr. Cuming's Collection ; locality unknown. 



42. Marginella bivaricosa (pi. lxxvii. f. 171, 172.), Lam. 

 Vol. marginata, Born, Mus. t. 9. f. 5. 6. 



M.ovali ; varice tumido, uno latere duplicato, latera, spira? partem, 

 et terminum anticum colligente; spira producta anfractibus ro- 

 tundatis ; apertura angusta ; columella callosa, late expansa, plicis 

 quatuor ; labio externo crasso, postice emarginato. 



Remarkable for the manner in which the lips of the aperture 

 are extended and thickened round the sides, and at the back of the 

 shell, nearly enveloping the spire, and forming a double ridge on 

 the right side. 



From Senegal. 



43. Marginella amygdala (pi. lxxvii. f. 160, 161, 162.), 

 Kiener, Sp. gen. coq. viv. 



M. ovali, ventricosa, pallide cinerea, ad latera et antice tumida, 

 fusco marginata ; spira conica, anfractibus albo-marginatis ; aper- 

 tura intiis fusca, antice sub-dilatata ; columella late expansa, alba, 

 plicis quatuor, quarum duabus anticis validis, spiralibus; labio 

 externo albo, crasso, versus apicem elevato, antice sub-acuto, pro- 

 ducto. Yariat pallide fulva, minus ventricosa ; variat etiam cinereo- 

 fusca. 



Figures 160-1, may be taken to represent the typical form of 

 this shell. Fig. 162, represents a rather young specimen of a 

 less ventricose variety in the Collection of Mr. Cuming, who also 

 possesses a pale fawn-coloured variety of similar form. 



From Senegal. 



