. Bulletins of American paleontology. Ore)ovician-Silurian Colonial Corals; Young and Ell\s 81. Text-figure 22. —A-N, Serial transverse sections illustrating basal astogeny in a corallum of Paleofavosiles siibelongus: USNM 459086, Section-interval 16-1 (Clinton Spring) (see also PI. 14, figs. 1-3). Corallite walls are solid, tabulae are stippled, septa are not shown: a probable algal grain is cross-hachured, a crinoid columnal is solid-hachured, sediment surrounded by the corallum is dash-hachured; scale bar is shown. Section A ( mm) represents the absolute base of the corallum, heights in
. Bulletins of American paleontology. Ore)ovician-Silurian Colonial Corals; Young and Ell\s 81. Text-figure 22. —A-N, Serial transverse sections illustrating basal astogeny in a corallum of Paleofavosiles siibelongus: USNM 459086, Section-interval 16-1 (Clinton Spring) (see also PI. 14, figs. 1-3). Corallite walls are solid, tabulae are stippled, septa are not shown: a probable algal grain is cross-hachured, a crinoid columnal is solid-hachured, sediment surrounded by the corallum is dash-hachured; scale bar is shown. Section A ( mm) represents the absolute base of the corallum, heights in mm for B-N are above that datum; P is the protocorallite, numbers in italics represent individual hysterocorallites; an asterisk indicates the first appearance of a particular hysterocorallite. Variability of corallite dimensions on transverse sec- tions is commonly quite different between sections taken from different heights within a single corallum (see Intraspecific variation, below). Walls and septa show normal characters of development quite low in a corallum, but both tended to change through growth. Well defined cyclomorphic variation is rare (see De- scription ofcoralla. above); where it is present, thick-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]
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