350 MOLLUSCA. 
Figures 457, 457.a, 4576, outer, inner, and profile views of the 
shell. 
Lorria CYMBIOLA (Gould). 
Testa solida, depresso-conica, arcuata (apice eccentrica) glauco et fusco- 
olivaceo radiata, radiatim creberrime puncto-striata: apertura elliptica ; 
lahio minutissime crenulato: factes interna, allida, spadiceo sordt- 
data ; limbo lato, fusco et albo tessellato. 
Lottia cymbiola, Gouin; Proceed. Boston Soc. Nat. Hist., i. 151. 
July 1846. Expedition Shells, 10. 
“The animiL of this beautiful little species has the foot and mantle 
of a delicate ilesh-colour, passing into brownish on the edge of the 
latter, which is fringed as usual, and is furnished near its edge by a 
series of vesicular protuberances; neck unusually long and slender, 
and, with the head, is delicate lake red; tentacles long and slender ; 
eyes inconspicuous ; branchial plume very small, and never protruded 
externally. It was invariably found attached to other shells, especially 
to L. zebrina, in which it excavated a cavity of sometimes an eighth 
of an inch deep. Its movements are therefore probably very slight. 
Two of them which were kept for examination, left their holes and 
removed about an inch, but returned again after a short time. They 
would remain in a jar attached to the same spot for twenty-four 
hours together, merely moving the head a little.” [3. Pp. c.] 
SHELL small, rather solid, depressed conical, or dome-shaped, arched 
at base, so as to rest on its two extremities; surface regularly and 
minutely striate, the striz minutely punctured ; colour bluish-white, 
radiated with about twelve rather broad but unequal pencils of dusky 
olive, which occupy nearly as much surface as the lighter intervals ; 
apex eccentric, obtusely rounded ; aperture oval, its margin delicately 
crenulated ; interior bluish-white, with a central dusky spatula, or 
with only here and there blotches of a rusty colour, especially about 
the margin of the muscular impression, which is well developed ; 
marginal border broad, irregularly chequered with black, or green 
and white. 
