338 MOLLUSCA. 
Figure 449, exterior of the shell; 449, profile of the shell; 449 6, 
the animal, as in motion; 449, the animal, from beneath. 
PATELLA PIPERATA (Gould). 
Testa scabrida, obliqué conico-depressa, olivacea, costato-striata, costis 
majoribus pallidioribus linea mediant saturatiort interrupta aspersis ; 
apice eccentricd, acuta: apertura ovata ; margine crenulato ; facies 
interna livida, fundo ferrugineo, radiis albidis insignt. 
Patella piperata, Goutp; Proceed. Boston Soc. Nat. Hist., il. 150. 
July 1846. Expedition Shells, 8. 
SHELL small, of moderate elevation, obliquely conical, apex at 
about the anterior third, acute and somewhat inclined forwards; ex- 
terior with numerous, coarse, unequal, granular stricee. Colour dull 
olive, with the larger striz ash-coloured, along the middle of some of 
which runs a dark line, interrupted at short intervals, so as to give 
the surface a coarsely dotted appearance. Aperture rounded-ovate ; 
margin crenulate; interior of a dull leaden or dark chestnut hue, tinged 
at the bottom with ferruginous, and rayed. with yellowish. 
Length an inch and one-fifth ; width nine-tenths of an inch ; height 
half an inch. 
Inhabits Cape de Verd Islands and Madeira. 
In some specimens the leaden hue prevails, in others the rusty ; and 
there is the usual variety in form. One specimen, a large one, has 
the exterior of a greenish ash-colour, and the interior highly polished 
and beautifully radiated with chestnut and white, overlaid with golden 
reflections. It is somewhat like P. scutellaris, of the Mediterranean, 
especially within, but it is less elongated and the surface less ribbed. 
It is also near to P. guttata, D’Orbigny, from the Canary Islands. 
Figures 449, 449a, 449 b, outer, inner, and profile views of the 
shell. 
