Image: haeckel siphonophorae 37

Siphonophorae:
(center): Discolabe quadrigata (Haeckel) = Physophora hydrostatica Forskål, 1775, colony
(top left): Discolabe quadrigata (Haeckel) = Physophora hydrostatica Forskål, 1775, gas bladder and bells from above
(top right): Discolabe quadrigata (Haeckel) = Physophora hydrostatica Forskål, 1775, single swimming bell from above
(bottom left): Discolabe quadrigata (Haeckel) = Physophora hydrostatica Forskål, 1775, trunk without polyps from below
(bottom right): Discolabe quadrigata (Haeckel) = Physophora hydrostatica Forskål, 1775, trunk without polyps from above
- from the book sets: Art Forms in Nature (Kunstformen der Natur) - by Ernst Haeckel (1899-1904).

- من صور كتب: النماذج الفنية في الطبيعة، لـ إرنيست هيكل (نشر ما بين 1899-1904 م.)