D. picta, [303]
Dorataspis, [78];
skeleton, [80]
Dorocidaris—see Cidaris
Dorsal elastic ligament of Antedon rosacea, [587]
Dorso-central plate of Echinarachnius parma, [543]
Dourine, disease of horses and dogs, [119]
Drepanidium (= Lankesterella), [97], [102]
Dreyer, on genera and species of Radiolaria, [87] f.;
on skeleton of Radiolaria, [82] n.