Permian crinoid Calceolispongia.

Bibliographic Details
Main Author: Teichert, Curt, 1905-1996
Format: Book
Language:English
Published: [New York] : [Geological Society of America], 1949.
Series:Memoir (Geological Society of America) ; 34.
Subjects:
Description
Physical Description:x, 132 pages : plates ( 1 folded in pocket) maps. ; 26 cm.
Bibliography:"References": pages 98-99.