CLARK A.H., - A monograph of the existing crinoids: The Comatulids - Vol

I, Part 4B- Superfamily Mariametrida (concluded the family Colobometridae) and Superfamily Tropiometridaa (except the families Thalassometridae and Charitometridae). Washington, 1947. In 4to, original wrappers, pp. VII-473 with 43 pls.

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