12 MARGIN ELL A. 



E. BIMACULATA, T:ite. South Australia. 



Pale primrose-yellow to yellowish white, with rufous-red 

 around the extremity of the anterior canal and on the callous 

 border of the hinder part of the aperture. Closely resembles 

 E. angulifera, Reeve; but differs in color and in having a less 

 angular and inflated body-whorl. Unfigured. 



E. LACTEA, Hutton (= Marginella formicula, Lam.). New Zealand. 

 E. PRAYENSIS, Rochbrune. Gape Verd Islands. 



Shell triangular, narrow in front, very thick, with obtuse spire ; 

 aperture narrow ; lip reflected, very finely denticulated ; col- 

 umella straight, sinuous in front ; color greenish. Length, 5 mill. 



The figure of this species arrived too late for insertion in my 

 plates. 



U 11 us MARGINELLA, Lann.rck. 



The Marginellas are tropical and subtropical in distribution, 

 a large proportion of the species inhabiting the Caribbean, West 

 African and Indo-Pacific provinces. A species occurs doubt- 

 fully in the cretaceous ; but in the eocene formation the genus is 

 well represented, and from that and subsequent formations at 

 least seventy-five fossil species have been characterized ; from 

 the United States, Europe and Australia. 



A number of monographs and catalogues of the species have 

 been published in recent times ; the most important are : 



KIENER. Coquilles vivantes, 1.834. A monograph including 56 

 species, with colored figures. 



SOWERBY. Thesaurus Conchyliorum, i, 1846. Contains descrip- 

 tions and figures of 108 species. 



PETIT DE LA SAUSSAYE. Journal de Conchyliologie, ii, 1851. A 

 list of 146 species, systematically arranged. 



H. AND A. ADAMS. Genera of Recent Mollusca, i, 190, 1853. 

 The species are divided among a number of subgenera, under 

 which they are alphabetically enumerated, numbering 159. 



REEVE. Conchologia Iconica, xv, 1865. Descriptions and 

 figures of 159 species. 



