. Bulletin of the Essex Institute. Essex Institute; Natural history; genealogy. ECHINODERMATA OF NEW EiNTGLAND. 39 nous in single row. Often obscurely "hooded ; Pro- boscis and radial tubes generally present, often absent, A. Without proboscis Cunina. B. With proboscis. I. Body-walls rigid .... Trachynema. II. Body-walls flexible Liriope. Cunina. Body disk-shaped, inflexible, destitute of ra- dial tubes. Tentacles rigid, arise from sides of the body. CUNINA. SECTION OF THE BELL RIM OF TRACHYNEMA. YOUNG TRACHYNEMA. not from disk margin. Velum muscular, forming the lower floor of
. Bulletin of the Essex Institute. Essex Institute; Natural history; genealogy. ECHINODERMATA OF NEW EiNTGLAND. 39 nous in single row. Often obscurely "hooded ; Pro- boscis and radial tubes generally present, often absent, A. Without proboscis Cunina. B. With proboscis. I. Body-walls rigid .... Trachynema. II. Body-walls flexible Liriope. Cunina. Body disk-shaped, inflexible, destitute of ra- dial tubes. Tentacles rigid, arise from sides of the body. CUNINA. SECTION OF THE BELL RIM OF TRACHYNEMA. YOUNG TRACHYNEMA. not from disk margin. Velum muscular, forming the lower floor of stomach-cavity. C. discoides. B. I. Trachynema. Umbrella mitre-shaped with rigid walls, with quick spasmodic movements in propulsion. Onward motion caused in part by vibration of velum. Tentacles numerous with rigid bases. Eight radial tubes, generally. 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 Essex Institute. 1n. Salem, Mass. , Essex Institute
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