Image: haeckel siphonophorae 7

Siphonophorae:
(top center): Epibulia Ritteriana (Haeckel) = Epibulia ritteriana Haeckel, 1888?, mature colony
(bottom right): Cystalia monogastrica (Haeckel) = Epibulia ritteriana Haeckel, 1888?, immature colony
(center): Salacia polygastrica (Haeckel) = Salacella uvaria (Fewkes, 1886)?, colony
(top left): Salacia polygastrica (Haeckel) = Salacella uvaria (Fewkes, 1886)?, gas bladder in cross-section
(top right): Salacia polygastrica (Haeckel) = Salacella uvaria (Fewkes, 1886)?, gas bladder from above
(bottom left): Salacia polygastrica (Haeckel) = Salacella uvaria (Fewkes, 1886)?, partial cluster of polyps (infertile) and medusae (fertile)
- 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.)