. Bulletin - United States National Museum. Science. 136 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. tion by the echinodeniis of the sessile habit; mid the assumption of the sessile habit went hiiiul in hand with the modification of the skeleton in the direction of the tj^je common to similarly inactive forms, such as sponges and Fio. 83.—Lateral view or a specimen or Eudiocrinvs junceus from the Lesser Sunda Islands, showdjo the RELATIVE proportions OF THE ARMS, PINNULES, CENTRODORSAl, AND CIRRI. Thus, as we understand it, the echinoderra skeleton considered strictly as the ech
. Bulletin - United States National Museum. Science. 136 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. tion by the echinodeniis of the sessile habit; mid the assumption of the sessile habit went hiiiul in hand with the modification of the skeleton in the direction of the tj^je common to similarly inactive forms, such as sponges and Fio. 83.—Lateral view or a specimen or Eudiocrinvs junceus from the Lesser Sunda Islands, showdjo the RELATIVE proportions OF THE ARMS, PINNULES, CENTRODORSAl, AND CIRRI. Thus, as we understand it, the echinoderra skeleton considered strictly as the echinoderm skeleton was from the first a skeleton of the spicular t_vpe, the counter- part of the skeleton of certain sponges and alcyonarians; but in reality this spicular echinodermal skeleton is not an original dcvolopmont like the spicular skeleton of. 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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