. Bulletins of American paleontology. 438 John M. Warn A. Text-figure 3. Disposition of trlmeres and lobes of the axial canal in Ectcnocrinus simplex. Rays are lettered A, B, C, D, and E. With intertrimeric sutures in the B ray, CD interray, and E ray, E. simplex has trimeres disposed as follows: one occupies the EA and AB interrays, another lies in the BC inter- ray and C ray, the third occupies the D ray and DE interray. Although E. simplex has trimeres, its axial canal has five lobes, all directed interradially. MORAL OF THE STORY The "law" of Wachsmuth and Springer is useful in s
. Bulletins of American paleontology. 438 John M. Warn A. Text-figure 3. Disposition of trlmeres and lobes of the axial canal in Ectcnocrinus simplex. Rays are lettered A, B, C, D, and E. With intertrimeric sutures in the B ray, CD interray, and E ray, E. simplex has trimeres disposed as follows: one occupies the EA and AB interrays, another lies in the BC inter- ray and C ray, the third occupies the D ray and DE interray. Although E. simplex has trimeres, its axial canal has five lobes, all directed interradially. MORAL OF THE STORY The "law" of Wachsmuth and Springer is useful in segregating crinoids into two apparent phyletic groups; however, more atten- tion must be given by crinoid specialists to disposition of pentameres, column angles, lumen angles, and cirri before reclassification can be 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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