Patella

Definition and stakes

Portrait of G. B. Sowerby G. B. Sowerby,  A conchological manual

“ Patelloida differs from Patella in the construction of the animal; Siphonaria, in the lateral siphon; and Ancylus, in the oblique twist of the axis, as well as in the nature of the animal. The Patellæ are marine. Fig. 229, P. Oculus.
PATELLIFORM. (Patella, a dish; forma, shape.) Shaped like a dish, or like shells of the genus Patella.
PATELLOIDA. Quoy and Gaimard. Lottia, Gray.—Fam. Phyllidiana, Lam.—Descr. Patelliform, rather flat; apex obtuse, leaning towards the posterior margin; muscular impression not symmetrical, but widest on the right side near the head of the animal
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Source: Gutenberg

Various,  The Atlantic Monthly (1858)

“ Patella is the Latin name, but children call it Tent-Shell. Oval at the base, it slopes upward to a point a little aside from the centre.
In this locality they are small, seldom more than an inch in length. At first, you will not readily distinguish them, they are so nearly of the color of the stones to which they are attached. This is one of those Providential adjustments by which the weak are rendered as secure as the strong. Slow in their movements, without offensive weapons, their form and their coloring are their two great safeguards.
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Source: Wikisource

Portrait of G. B. Sowerby G. B. Sowerby,  A conchological manual

“ The shells of this genus so closely resemble Patella that it is almost impossible to make the distinction from the shells alone. They are, however, generally flatter, and have the apex placed somewhat nearer the posterior margin. The animals are very distinct. Fig. 231, P. Antillarum.
PATELLOIDEA, Bl. or patelliform shells. The third family of the order Monopleurobranchiata, Bl.; the animals of which are described as depressed, flattened, covered by a wide external shell, which is patelliform and non-symmetrical. This family contains the genera Umbrella and Siphonaria.
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Source: Gutenberg

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