Porcellanids are, after brachyuran crabs, the most successful decapod group to achieve a crab-like body form through carcinisation. Unlike brachyurans, porcellanids retained the ability to swim by flapping their abdomen, armed with a well developed tail fan. Here, we present an exceptional case of carcinisation, with the South-American porcellanid, Allopetrolisthes spinifrons, an obligatory commensal of the sea-anemone species Phymactis papillosa and Phymanthea pluvia.

Perhaps there was yet another cause, chiefer than those above named, why Grisi came out with such determined vigour and renovated powers.

In France the emphasis fell on pronatalism; after the crushing defeat in the Franco-Prussian War of 1870–1 and with the French population being outstripped by the German, health propaganda encouraged large families.

Still, this is a pretty joyous thing to behear.