. A manual of zoology. Zoology. 302 ECHIXODERMA radialia to unite in a complicated plexus in the ccntrodorsal. A pfoblematical ^o-ealled Jerij/ or^;jii also beu'ins in tlie eentrodorsal and extends up through the avis of the tlieea to tlie oral disc. It is apparently homologous with the â¢heart- of other echinoderms. Its upper end lies in a cell complex trom whicli the reticulum of genital cords extends into the arms, su'eUmg tn the pinnuUe to the gonads ^ng'". .^oSV The dorsal organ in the ccntrodorsal is enclosed m the ihanibfn-J er,cJ«. a of the cadom which extends into
. A manual of zoology. Zoology. 302 ECHIXODERMA radialia to unite in a complicated plexus in the ccntrodorsal. A pfoblematical ^o-ealled Jerij/ or^;jii also beu'ins in tlie eentrodorsal and extends up through the avis of the tlieea to tlie oral disc. It is apparently homologous with the â¢heart- of other echinoderms. Its upper end lies in a cell complex trom whicli the reticulum of genital cords extends into the arms, su'eUmg tn the pinnuUe to the gonads ^ng'". .^oSV The dorsal organ in the ccntrodorsal is enclosed m the ihanibfn-J er,cJ«. a of the cadom which extends into stalk and cirri. Si(b Class Iâ 'riiioidcj. The foregoing account applies entirely to the Eucrinoidca, which may be di\ided into two groups: â , â ⢠, n Order I TESSELLATA vTahrocrinoideaV Theca wiih its side walls composed of immovably united thin plates; the ambulacral -rooves usually completely covered bv calcareous plates. Exclusively 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 Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929, ed. and tr. New York, H. Holt
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
