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Studies on the Hexactinellida. Contribution 1. (Euplectelliæ). By Isao Iijima. Pp. 299; 14 plates. (Reprinted from the Journal of the College of Science, Imperial University, ...
J. Keith Rigby, Well-Preserved Specimens of the Sponges Gondekia (Heteractinida) and Pseudohydnoceras (Hexactinellida), Middle Devonian of New York State, Journal of Paleontology, Vol. 68, No. 4 (Jul.
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