. Bulletins of American paleontology. North American Paracrinoidea: Parsley & Mintz 35 These intercalations are scattered over the thecal surface.^ The principal addition of thecal plates occurs, however, at the proximal end of the theca where the plates are smaller and have not developed the prominent, concave external Text-fig. 2. Dorsal view of Comarocystites tribrach'ius, n. sp., (Plate 1, fig. 4) showing the bifurcation of the left arm and the arm bases. Anal pyramid is adjacent and proximal to the right arm base. Openings in the arm bases are for the passage of the coelomic
. Bulletins of American paleontology. North American Paracrinoidea: Parsley & Mintz 35 These intercalations are scattered over the thecal surface.^ The principal addition of thecal plates occurs, however, at the proximal end of the theca where the plates are smaller and have not developed the prominent, concave external Text-fig. 2. Dorsal view of Comarocystites tribrach'ius, n. sp., (Plate 1, fig. 4) showing the bifurcation of the left arm and the arm bases. Anal pyramid is adjacent and proximal to the right arm base. Openings in the arm bases are for the passage of the coelomic extensions from the theca into the arms. 8 These intercalations are not uncommon on the other species but seem to appear late in ontogeny, as evidenced by their absence in small 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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