Image: haeckel siphonophorae

Siphonophorae:
(top center): Porpema medusa (Haeckel) = Porpema prunella (Haeckel, 1888), adult colony, side view
(top left, upper): Porpema medusa (Haeckel) = Porpema prunella (Haeckel, 1888), adult colony, group of sexual polyps
(top right, upper): Porpema medusa (Haeckel) = Porpema prunella (Haeckel, 1888), adult colony, gas bladder
(center right): Porpema medusa (Haeckel) = Porpema prunella (Haeckel, 1888), adult colony, side view without tentacles
(bottom right): Porpalia prunella (Haeckel) = Porpema prunella (Haeckel, 1888), adult, top view
(top left, lower): Discalia medusina (Haeckel) = Porpema prunella (Haeckel, 1888)?, young colony, bottom view without tentacles
(center left): Discalia medusina (Haeckel) = Porpema prunella (Haeckel, 1888)?, young colony, side view
(center): Disconalia gastroblasta (Haeckel) = Porpita sp., young colony, bottom view
(top right, lower): Disconalia gastroblasta (Haeckel) = Porpita sp., very young colony, bottom view without tentacles
(bottom left, left half): Disconalia gastroblasta (Haeckel) = Porpita sp., young colony, horizontal section through upper bell
(bottom left, right half): Disconalia gastroblasta (Haeckel) = Porpita sp., young colony, horizontal section through lower bell
(bottom center): Disconalia gastroblasta (Haeckel) = Porpita sp., young colony, sexual polyp
- 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.)