Image: haeckel echinidea 60

Echinidea:
Cidaris tribuloïdes (Lamarck) = Cidaris tribuloides Lamarck, 1816, from below
Cidaris baculosa (Lamarck) = Prionocidaris baculosa (Lamarck, 1816)?, mouth region of shell from below (spines removed)
Cidaris baculosa (Lamarck) = Prionocidaris baculosa (Lamarck, 1816)?, periproct region of shell from above (spines removed)
Dorocidaris papillata (Agassiz) = Cidaris cidaris (Linnaeus, 1758), pedicellaria
Strongylocentrus nudus (Agassiz) = Strongylocentrotus nudus (A.Agassiz, 1863), pedicellaria in lengthwise section
Phyllacanthus annulifera (Agassiz) = Prionocidaris baculosa (Lamarck, 1816), spine
Phyllacanthus baculosa (Agassiz) = Prionocidaris baculosa (Lamarck, 1816), spine
Psammechinus miliaris (Agassiz) = Psammechinus miliaris (P.L.S.Müller, 1771), endplate of tube-foot
Centrostephanus longispinus (Peters) = Centrostephanus longispinus (Philippi, 1845), spine in cross-section
Sphaerechinus esculentus (Desor) = Sphaerechinus granularis (Lamarck, 1816), pedicellaria in lengthwise section
Sphaerechinus esculentus (Desor) = Sphaerechinus granularis (Lamarck, 1816), mouthparts ("Aristotle's Lantern") from the side
- 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.)