Descriptions of New Species of Mar ginella, Sfc. 3 



millim.) A very old worn example measured 25 millim. long, 

 and 14. millim. broad. 



Habitat. It is said to be brought from the coast of Yu- 

 catan. M. carnea is well known to occur at Key "West. 



MARGINELLA antiqua Fossil. 



Testa elongato-ovata, polita, spira obtecta : labio extus incrassato, 

 intus acute denticulate ; cdumella oblique quadriplicata ; apertura an- 

 gusta, ad extremain spiram extensa. 



DESCRIPTION. Shell oblong-ovate, with polished enamel ; 

 lip much thickened without, closely and deeply denticulate 

 within, and extending quite to the summit of the spire which 

 is entirely'concealed by a vitreous deposite ; aperture narrow ; 

 columella with four oblique well developed plaits. 



Length, 1.10 inch, (28 millim.) Breadth, 0.57 inch, (14 

 millim.) 



Habitat. Found in the miocene tertiary deposites of 

 Petersburgh, Va. 



Remarks. It is a pity that this large and striking Mar- 

 ginella (for which I am indebted to Chas. M. Wheatley, Esq.) 

 should have lived at a period when no conchologist existed to 

 appreciate its elegance, such as it must have exhibited in its 

 freshness, and it is equally fortunate that it has so well sur- 

 vived the vicissitudes of ages, as to show most of its original 

 beauties, deprived only of color. I am acquainted with no re- 

 cent species which illustrates its character. It would occupy 

 an intermediate position between M. bullata Born, and M. 

 angustata Sowb., but for its serrated lip, and less cylin- 

 drical form. 



In a catalogue of the Marginellidae in my collection, 

 printed for distribution, appear the names of Marginella 

 GambiensiS) and M. vermiculata. Both these names I have 

 since abandoned, the former proving to be a variety of M 



