What a great way to remember this summers seaside holiday! And a bit educational as well! ( OK just a bit educational) They are
from a Plate "Representatives of Phyla Mullusca Echinodermata Ctenophora and Arthropoda" that was included in the 1851 Edition of The Iconographic Encyclopaedia of Science, Literature and Art.
See wonderful 1800s scientific art and summer fun all in one.