. Bulletins of American paleontology. Cambrian Trilobites, South Dakota 253. Text-figure 1. A growth series of Coosia albcrtensis Resser. A. Anapro- taspis, X 50; B, C. Two metaprotaspides, X 50, X 48; D, E. Small and large paraprotaspides, X 40, X 38; F. Small early meraspis, X 13; G. Large early meraspid cranidium, X 8; H. J. Two late meraspid cranidia, X 13, X 19; I. Immature librigena, X 6; K. Hypostoma, X 10; L, M. Small and large holaspid cranidia, X , X 1-7. (All drawings were made from photographs.). Please note that these images are extracted from scanned page images that may have

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. Bulletins of American paleontology. Cambrian Trilobites, South Dakota 253. Text-figure 1. A growth series of Coosia albcrtensis Resser. A. Anapro- taspis, X 50; B, C. Two metaprotaspides, X 50, X 48; D, E. Small and large paraprotaspides, X 40, X 38; F. Small early meraspis, X 13; G. Large early meraspid cranidium, X 8; H. J. Two late meraspid cranidia, X 13, X 19; I. Immature librigena, X 6; K. Hypostoma, X 10; L, M. Small and large holaspid cranidia, X , X 1-7. (All drawings were made from photographs.). 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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