. Zoology : for students and general readers . Zoology. FOSSIL CRIN0ID8. 107 (the cilia having disappeared), now constituting a layer of protoplasm conforming to the outline of the Antedon. Meanwhile the cup of the crinoid has been forming. It then assumes the shape of an open bell ; the mouth is formed, and five lobes arise from the edges of the calyx. Afterward five or more, usually fifteen tentacles, grow out, and the young Antedon appears, as in Fig. 66, C The walls of the stomach then separate from the body-walls. The animal now begins to represent the primary stalked stage of the Crinoid
. Zoology : for students and general readers . Zoology. FOSSIL CRIN0ID8. 107 (the cilia having disappeared), now constituting a layer of protoplasm conforming to the outline of the Antedon. Meanwhile the cup of the crinoid has been forming. It then assumes the shape of an open bell ; the mouth is formed, and five lobes arise from the edges of the calyx. Afterward five or more, usually fifteen tentacles, grow out, and the young Antedon appears, as in Fig. 66, C The walls of the stomach then separate from the body-walls. The animal now begins to represent the primary stalked stage of the Crinoids, that which is the permanent stage in Rliizocrinus, Pentacrinus, and their fossil allies. After liv- ing attached for awhile (Fig. 67), it becomes free (see right- hand figure) and moves about over the 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 Packard, A. S. (Alpheus Spring), 1839-1905. New York : Henry Holt
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1879
