A monograph of the Echinoidea. IV. 2. Clypeasteroida. Clypeasteridæ, Arachnoidæ, Fibulariidæ, Laganidæ and Scutellidæ. Atlas
Mortensen, T. (1948). A monograph of the Echinoidea. IV. 2. Clypeasteroida. Clypeasteridæ, Arachnoidæ, Fibulariidæ, Laganidæ and Scutellidæ. Atlas. C.A. Reitzel: Copenhagen. 20, LXXII plates pp.
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