54 TRANSACTIONS OF THE WAGNER FREE 



Marginella elegantula n. s. 

 Plate 4, figure 7. 



Shell of the group of M. liczinatlta Kiener, from which species it differs by 

 being proportionately stouter, rounder and less fusiform, with a shorter spire 

 and wider aperture. Both have four well-marked plaits, which in M. hcematita 

 are grooved when adult. Both are externally smooth and have the outer lip 

 marginated externally and denticulate internally, but in hcsmatita the denticu- 

 lations extend the whole length, while in the present species they are verj? faint 

 and confined to the middle part of the inside of the outer lip. Max. Ion. of 

 shell ii.o; lat. 6.5 mm. 



Tampa silex-beds, rare. 



This species may be regarded as in the ancestral line of such forms as M. 

 niargarlta and M. hcematita Kiener, but I have not found any connecting 

 Pliocene link, as yet. 



Marginella New^mani n. s. 

 Plate 4, figure 8. 



Shell small, stout, biconic, four-whorled, smooth, the spire glazed with cal- 

 lus ; aperture short, wide, the outer lip with about six coarse denticles on the 

 inner side, smooth near the posterior commissure, marginated externally ; in- 

 ner lip with a wash of callus, with four subequal, not prominent, rather ob- 

 lique plaits. Max. Ion. 5.5 ; lat. 3.7 mm. 



Tampa silex-beds, i^are ; Mr. L. G. Newman. 



This species belongs to the same group as the last ; were it ribbed it would 

 fall in nicely with such species as M. striata Sby. and M. plicata Lea. Its 

 small size, breadth, and other features well shown by the figure sufficiently 

 distinguish it. 



Marginella pallida Donovan. 



BuUapat/ida Don., British Shells, pi. 66, fig. 527, 1800 (syn. excl.). 

 Marginella pallida Redfield, Cat. Marg., pi. 247, No. 138. 



Caloosahatchie beds, rare. Recent Florida, Bermuda, Bahamas, Antilles. 



The Caloosahatchie specimens are small but unmistakable. 



Marginella avena var. avenacea Deshayes. 

 Marginella avenacea Deshayes, in Lam. An. s. Vert., 2me. ^d. x. p. 455, 1844. 

 Caloosahatchie beds. Recent Florida and the Antillean region. 

 This is simply a dwarf M. avena Val. and, except in size, agrees with that 

 species in form, while in size it agrees with specimens to which the varietal 

 name has been applied. 



Marginella styria Dall. 

 Plate 5, figure i. 

 Marginella styria Dall, Rep. Blake Gastr. Bull. Mus. Comp. Zool. xxviii. p. 13, 1889. 



Caloosahatchie beds. Recent off the coast of Georgia, in 400 fathoms, 

 and living off Sombrero Island, West Indies, in 54 fathoms. 



