The 100 Ám scale bar applies to figs. la, 2a, 3a, 4-6; figs. lb, 2b and 3b have their own 10 Ám scale bars.
Figs. 1-5. Carposphaera angulata forma juniperum. Note variance in number of fibrils connecting medullary and cortical shell, differences in thickness of cortical shell (figs. 1, 2 and 5 are relatively delicate, figs. 3 and 4 more robust; see also pl. 15, fig. 3a), and three-bladed nature of the distal ends of spines. Figs. lb, 2b, 3b: details of the medullary shell. Fig. 5a: focus on medullary shell; fig. 5b: focus on surface of the cortical shell. BSS 28B(VI/537 and 515); 28B(IX/1186); BSS 28B(VI/520) and BSS 15B(F) EF C38.