- The
periostra**** (/ˌpɛriˈɒstrəkəm/ PERR-ee-OS-trə-kəm) is a thin,
organic coating (or "skin") that is the
outermost layer of the s**** of many s****ed...
-
resembles the quahog, but the s**** of the
ocean quahog is rounder, the
periostra**** is
usually black, and on the
interior of the s****, the
pallial line...
- the land
snail shown above) also have an
outer s****
layer called the
periostra**** which is
composed of the
protein conchiolin. Some land
snails (especially...
- are
features of the s****,
including crease and an
encrusting layer (
periostra****) that
covers most of the s****.
Gills and
reproductive structures also...
- it can show irregular,
concentric zigzags on a
cream background. The
periostra**** is dark
brown and
forms a
broad band
around the s**** margin; it is velvety...
- the
outermost layer,
which in
almost all
cases is all
conchiolin (see
periostra****).
Molluscs never use
phosphate to
construct their hard parts, with the...
-
Allonautilus Allonautilus scrobiculatus s**** with
periostra**** removed Scientific classification Domain:
Eukaryota Kingdom:
Animalia Phylum: Mollusca...
- In case such
periostra**** pustules are removed, dark
coloured spots still appear on the
conch body. The
Gauri Type (with
periostra**** spots) of Valampuri...
- is the main
component in the
outer layer of the s****,
known as the
periostra****. The
inner layers of the s**** are
composed of a
network of
calcium carbonate...
-
prominent columellar plicae. It is
usually pure
white under a
heavy brown periostra****, but it can also be a pale
apricot color. It can
sometimes be dotted...
