. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 132 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY Forms like some of these genera may very well correspond to ancestors of the Cheirocrinidae and other families having more stable structures, which also are more specialized, but because c aTal^h OXAj&^&fo. E 4\__/' ' ' " 2 " 7 ~^ p Fig. 3. Plate arrangement of rhombiferan cystoids (laterals and radials differentiated as in Figure 1 and position of anus marked by "A"). The diagrams illustrate stability in placement of pore rhombs on plates 1+5. 1
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 132 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY Forms like some of these genera may very well correspond to ancestors of the Cheirocrinidae and other families having more stable structures, which also are more specialized, but because c aTal^h OXAj&^&fo. E 4\__/' ' ' " 2 " 7 ~^ p Fig. 3. Plate arrangement of rhombiferan cystoids (laterals and radials differentiated as in Figure 1 and position of anus marked by "A"). The diagrams illustrate stability in placement of pore rhombs on plates 1+5. 12 + 18, and 14 + 15 and they demonstrate tendency of various plates to change in shape and position. A, EcMnoenorinites, ; B, Callocystites, ; C, Schizocystis, MJSil.; D, Lepadocystis, ; E, Cheiroorinits, ; F, Glyptocystites, MLOrd. (All modified from Bather.). 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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