. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Fig. 6. A, plate arrangement of a regular rhombiferan cystoid, Cystoblas- tus, B, hypothetical evolutionary derivative of a ^re-Cystoblastus type and C, a typical eublastoid in which correlation with elements of pre- sumed rhombiferan ancestral stock is indicated by differentiation of circlets as in Figure 1. Arrows denote position of ambulacra and "A" location of the anus. The Mastoid radials are identified as rhombiferan infralaterals, lancet plates as rhombiferan radials, and deltoids as rhombifera
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Fig. 6. A, plate arrangement of a regular rhombiferan cystoid, Cystoblas- tus, B, hypothetical evolutionary derivative of a ^re-Cystoblastus type and C, a typical eublastoid in which correlation with elements of pre- sumed rhombiferan ancestral stock is indicated by differentiation of circlets as in Figure 1. Arrows denote position of ambulacra and "A" location of the anus. The Mastoid radials are identified as rhombiferan infralaterals, lancet plates as rhombiferan radials, and deltoids as rhombiferan 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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Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
