. Bulletin of the Essex Institute. Essex Institute; Natural history -- Periodicals; Essex County (Mass. ) -- History Periodicals. ECHINODERMATA OF NEW ENGLAND. 71 1. The adult pluteus of Ophiopholis has two arms very much longer than the others. 2. The pluteus of Arbacia has eight oral and two anal arms. No other New England pluteus has the two anal arms as far as known. 3. The pluteus of Strongylocentrotus has eight oral arms and epaulettes, ciliated appendages formed by the outgrowth of the ciliated chords at the angle of the junc- tion of the arms (larger) with the PLUTEUS OF OPHIOPH
. Bulletin of the Essex Institute. Essex Institute; Natural history -- Periodicals; Essex County (Mass. ) -- History Periodicals. ECHINODERMATA OF NEW ENGLAND. 71 1. The adult pluteus of Ophiopholis has two arms very much longer than the others. 2. The pluteus of Arbacia has eight oral and two anal arms. No other New England pluteus has the two anal arms as far as known. 3. The pluteus of Strongylocentrotus has eight oral arms and epaulettes, ciliated appendages formed by the outgrowth of the ciliated chords at the angle of the junc- tion of the arms (larger) with the PLUTEUS OF OPHIOPHOLIS. 4. The pluteus of Echinarachnius is without epaulettes, with eight arms, six of which bear marked pigment spots near their extremities. C. False pupa. The false pupa is probably a young of Lophothuria. It is globular, bright red in color, opaque, with a cluster of knobs at one pole and two knobs on one side. The former develop into the tentacles of the adult, the latter into feet ot the soft foot-like region of 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 Essex Institute. Salem, Mass. , Essex Institute
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