Henry Bourée
1909, 9 August (taken)
Physalie [ Physalia Physalis - Portuguese man-of-war]

Autochrome
Creative Commons - Wikipedia
Although credited to National Oceanic and Atmospheric Administration (NOAA) this is not the original source.
 
Published in: Henry Bourée, 1912, De la surface aux abimes: l'océanographie vulgarisée, (Paris: C. Delagrave)
 
LL/63398