Image: haeckel peromedusae

Peromedusae:
(center): Periphylla mirabilis (Haeckel) = Periphylla periphylla (Péron & Lesueur, 1810), bottom view
(bottom left): Periphylla mirabilis (Haeckel) = Periphylla periphylla (Péron & Lesueur, 1810), side view
(bottom right): Periphylla Peronii (Haeckel) = Periphylla periphylla (Péron & Lesueur, 1810), side view
(top left): Periphylla hyacinthina (Steentrupp) = Periphylla periphylla (Péron & Lesueur, 1810), mouth tube
(top right): Periphylla mirabilis (Haeckel) = Periphylla periphylla (Péron & Lesueur, 1810), schematic section
(top center): Periphylla mirabilis (Haeckel) = Periphylla periphylla (Péron & Lesueur, 1810), sensory bulb
(bottom center): Periphylla mirabilis (Haeckel) = Periphylla periphylla (Péron & Lesueur, 1810), cross-section through tentacle root
- 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.)