UNIV ALVE MOLLUSCA. 463 
ornamental, for some of the streets of Vera Cruz are said to be 
paved with Strombus gigas. 
The animal which inhabits this shell presents a distinct head, pro- 
vided with a trunk or snout, and with two tentacles or horns, each 
bearing a large and vividly-coloured eye. The foot is compressed and 
divided into two portions, the posterior one, which is the longest, bear- 
ing a horny operculum. In the eagle-winged Strombus, represented 
in Figs. 303 and 304, these several peculiarities are well developed. 
This shell is large, turbinate, distended in the middle, with an acutely- 
Fig. 304.—Shell of Strombus gigas. Fig. 305.—Strombus gallus (Linn.). 
pointed spire studded with conical tubercles, the right edge very 
broad, rounded off below. The opening is of a vivid rose purple 
fading into white. It is a native of the Antilles. 
Strombus gallus, or the Angel-winged (Fig. 297), is veined with 
stripes of white and red, and comes from the coasts of Asia and 
America. Strombus luhuanus (Fig. 306) is fawn-coloured, marked 
with white, externally the right edge is red and striped, inside the 
columella is shaded purple and black. 
Strombus cancellatus, the trellised Strombus (Fig. 307), is small 
in size, and white in colour. Strombus thersites is also represented 
in Fig. 308. 
The genus Pveroceras, from rrepbv, wing, and xépas, horn, in many 
respects resembles the genus Stromébus. The species are distinguished 
