Plate 3. Scale bar for figs. 1-13 = 100 µm. Codes after sample description are slide description and England Finder coordinates, respectively. Distinctive external morphologies or features allow for identification of taxa despite various preservation problems. 11-13. Amphicraspedum murrayanum. (11, 12) = forms from the same assemblage that have undergone less diagenesis; (13) = a spongy radiolarian skeleton totally replaced by clay. Sample 165-1001A-27R-1, 108-110 cm, cs.3 U5/2, X17/3, F36/2.