STROMBUS. Pitfa 
Strombus oniseus. 
M. Deshayes has ably explained that two species have 
hitherto been confounded under this appellation, and has 
given an ample description of the one which he has separated 
as the Oniscia Lamarcku. Since I know of no similar ex- 
position of the distinctive features of the first-known member 
of that genus, nor any very characteristic figure of it, I have 
thought it desirable to delineate and describe it in the present 
work. It appears to have been termed Voluta verruculata 
by Karsten in the ‘Museum Leskeanum’ (vol. i. p. 226). 
O. Oniscus, Lin. (pl. 5, f. 3), shell elongated-ovate, solid when 
adult, white, marbled with wavy brown (more frequently linear) 
longitudinal spots and markings, with fine revolving raised 
wrinkles, and spiral rows of tubercles, of which there are three 
series upon the body-whorl, the first of which is double, the 
other two are narrower than their intervals; this upper series, 
the surface above which is plano-concave, is continued so as to 
coronate, as it were, the penult volution. Spire occupying 
about one-seventh of the entire length; apex very prominent 
and papillary. Aperture white; outer lip very thick, edged 
with coarse teeth like sulci; inner lip expanded, not coloured, 
roughened by very numerous pimple-like dots. Tail very 
short, rather recurved. 
Strombus Buctter. 
As M. Deshayes has surmised, this is nothing more than a 
form of gigas. The young specimens, which are severally 
marked in the Linnean cabinet for this and the succeeding 
species, are so alike that one feels surprised at their ever 
having been held distinct. The individual which represents 
Lucifer in the collection very closely resembles plate 90, 
figure 879 of the third volume of Martini’s ‘Conchilien 
Cabinet. The synonymy includes the young of another 
Strombus likewise, but not a single representation of an adult 
shell. 
