In the Osaka gulf of Tannowa fishermen's cooperative association
Classroom of the shellfish
  Beach University PAGE
Ark
shell
Rapana
venosa
Little neck Aba-
lone
J.ivory
shell
Rusty
tegura
Disk
abalone
Mus-
sel
Ribbed
little n.
Turban
shell
Pen
shell
Japane.
abalone
coc-
kle
Washing-
ton clam
 
Ribbed little neck
(Veneridae)
This shellfish lives in the sand mud bottom of the intertidal zone and inhabits to the place that is deeper than a short-necked clam. The husk is relatively thick. This shellfish reaches (length 5 * height 4.2 * swelling 3.2)cm. This shellfish has 30-35 big emission ribs.
(※ emission rib = line)

「水のいきものシリーズ第1集 大阪湾・磯に生きる貝
This photo is mentioned from the above book which the Natural history museum .Kishiwada city published.
The sentence mentioned above were provided by Moments