DALL] REVIEW OF AMERICAN VOLUTID. 353 
ENATA ARCHERI Angas 
Voluta archeri Aneas, P. Z. S. Lond., 1865, p. 55, pl. m1, figs. 4, 5. 
Lyria archert Tryon, Man. Conch., tv, p. 104, pl. 31, fig. 144, 1882. 
Antilles, at Montserrat and Martinique. 
A rare species, which, like E. barnesii Gray, has much the general 
body sculpture of the Australasian Lyrias. 
ENZTA REEVEI Dall, nom. nov. 
Voluta guttata Rerve, Conch. Icon., Mon. Voluta, pl. xxu, fig. 56, Dec. 
1849; not of Dillwyn, 1817. 
Lyria guttata Crosse, Journ. de Conchyl., xiv, p. 114, 1866. 
Honduras (Dyson, two specimens). 
Not reported since the original collection was made. Agrees in 
general character with FE. guildingi. 
ENZTA GUILDINGII Sowerby 
Voluta Guildingii SowErBy, Thes. Conchyl., 1, p. 214, pl. 55, figs. 110, 111, 
1847. 
Lyria is seas Guildingit H. anp A. ApAms, Gen. Rec. Moll., 1, p. 167, 
1853; Crosse, Journ. de Conchyl., xiv, p. 115, 1866. 
St. Vincent, West Indies, Guilding. 
This and the preceding species are the smallest of the group, but, 
unless the soft parts show some peculiarities not now known, seem 
to belong to this group. The Lyria columbella Sowerby and the 
Microvoluta australis of Angas, do not, from the figures, appear to 
be properly included in the family Volutide, but resemble elevated 
forms of the Marginellide. 
Genus PLEJONA Bolten 
Plejona (sp.) Botten, Mus. Boltenianum, p. 59, 1708. 
Plejona Datu, Nautilus, xx, Apr. 1906, no. 12, p. 143; V. spinosa LinnkE 
(as Conus) selected as type. 
Volutospina BuLLEN-Newrton, Proc. Mal. Soc. Lond., vm, p. 103, June, 
1906; same type. 
In the Eocene and Oligocene Tertiary of the coastal plain bor- 
dering the Gulf of Mexico we find a variety of fossil Volutacea, 
some of which prefigure the later groups to be developed, while 
others appear to have left no successors in a direct line. As I have | 
frequently pointed out, the place to find the nearest relatives of a 
given existing fauna is in the geological strata of the region at 
present occupied by that fauna, or in its vicinity, and not in distant 
regions. Also, it is practically certain that during the Tertiary 
epoch the then existing invertebrates were divided into faunz nearly 
or quite as well marked as those recorded to-day. 
