T. Mortensen

• A monograph of the echinoidea III. 3 Camarodonta. II. Echinidæ, Strongylocentrotidæ, Parasaleniidæ and Echinometridæ
• A monograph of the echinoidea 1. Cidaroidea
• A monograph of the echinoidea III. 1 Aulodonta with additions to Vol. II (Lepidocentroida, and Stirodonta)
• A monograph of the echinoidea III. 2 Camarodonta. I. Orthopsidæ, Glyphocidæ, Temnopleuridæ and Toxopneustidæ
• A monograph of the echinoidea II. Bothriocidaroida, Melonechinoida, Lepidocentroida, and Stirodonta
• A monograph of the echinoidea IV. 1 Holectypoida, Cassiduloida
• A monograph of the echinoidea IV. 2 Clypeastroida. Clypeastridæ, Arachnoidiidæ, Fibulariidæ, Laganidæ and scutellidæ
• A monograph of the echinoidea V. 2 Spatangoida. II [text]