28 , PRUNUM. 



Section Prunum (Ma-tini). Adams. 



Shell smooth, oval, spire slightly prominent ; outer lip thick, 

 unarmed, inner lip frequently forming a callous deposit ; color 

 light gray or yellowish gray, usualty without distinct bands or 

 spots ; exterior lip-margin sometimes orange-brown. 



M. MARGINATA, Born. PI. 8, figs. 44-51. 



Occasional^ very obscurely two-banded ; callous deposit on 

 inner lip wide and thick, so that viewed from the back the shell 

 appears margined all round, like a Cyprsea. Length, 1 inch. 

 Senegal, West Africa ; West Indies ; Brazil. 



M. marginata is a West African species which, like many 

 others from that locality, reappears in the West Indies, where 

 it has received the name of M. cincta, Kiener (fig. 46). The last 

 has hitherto been considered distinct, but I find no characters 

 by which to separate it. I am compelled to add to the synonymy 

 as a minor variety, the West India M. Storeria, Couthouy (fig. 

 41), a name applied to the smaller and usually younger specimens 

 of 'M. cincta, and in which the color is sometimes darker; also 

 M. amygdala, Kiener (fig. 51), which, coming from West Africa, 

 is similarly related to M. marginata. M. cransilabrum, Reeve (fig. 

 48), M. Saulcyana, Petit (fig. 49), M. Loroisi, Bernard! (fig. 50), 

 are also synonyms. Apparently M. marginata, like the West 

 Indian M. prunum, occurs on the West Coast of America also ; 

 at least, I have before me specimens said to come from Panama 

 (Haagensen) and San Bias (Duff). 



M. CURTA, Sowb. PL 8, fig. 52. 



Light grayish brown, strigate with white longitudinally, or 

 obsolete^ narrowly banded with white ; lip-margin externally 

 marked with orange, lip and callus white, interior of aperture 



orange-color. Length, '85-1 inch. 



West Coast of South America. 



A darker-colored, thinner, more swollen shell than the 

 preceding species; peculiar in its strigations, appearing as 

 though scratched. 



M. LABROSA, Redfield. PL 8, figs. 53, 54. 



Yellowish white, lip-margin and callus white. 



Length, 10-12 mill, 



West Indies. 



