. Bulletin - United States National Museum. Science. KEVISIOlSr OF PALEOZOIC STELLEROIDEA. 133 -^oVnc^ C9®0. AGALMASTER INTERMEDIUS Schdndorf. Agalmaster intermedius Schondorf, Palaeontographica, vol. 56, 1909, pp. 82, 108, pi. 11, fig. 14; Jahrb. nassaiiisch. Ver. Naturk., "Wiesbaden, vol. 62, 1909, p. 30. From the Upper Coblenzian at Mielleii-on-tlie-Lalm, Germany. Genus RHENASTER Schondorf. Text fig. 10. Rhenaster Schondorf, Palaeontographica, vol. 50, 1909, pp. 05, 108, pi. 8, fig. 3; pi. 10, figs. 1, 4. Remarks.—Rhenaster is a small form and dilTers from Xenaster, Agalmaster, and Dev
. Bulletin - United States National Museum. Science. KEVISIOlSr OF PALEOZOIC STELLEROIDEA. 133 -^oVnc^ C9®0. AGALMASTER INTERMEDIUS Schdndorf. Agalmaster intermedius Schondorf, Palaeontographica, vol. 56, 1909, pp. 82, 108, pi. 11, fig. 14; Jahrb. nassaiiisch. Ver. Naturk., "Wiesbaden, vol. 62, 1909, p. 30. From the Upper Coblenzian at Mielleii-on-tlie-Lalm, Germany. Genus RHENASTER Schondorf. Text fig. 10. Rhenaster Schondorf, Palaeontographica, vol. 50, 1909, pp. 05, 108, pi. 8, fig. 3; pi. 10, figs. 1, 4. Remarks.—Rhenaster is a small form and dilTers from Xenaster, Agalmaster, and Devonaster in the complete absence of all abactinal accessory plates, allow- ing the radial and sujDra- marginal pieces to ad- join one another closely. Dorsal axillary disk areas not completely but almost absent, supramarginals in the main lying ^yholly upon the inlramarginals and the two columns of plates together margin- ing the rays. There also are no accessory plates of any kind on the actinal side. Other- wise the generic struc- ture is that of Xenaster, except that in Rhenaster the firet pair of interbrachial marginals are not ye I pushed so much orally and they almost take part in margining the axils. Madreporite unknown. Genoholotype and only species (one specimen).—R. schwerdi Schon- dorf, from the Lower Deyonic (Upper Coblenzian) at Dorrbachtal, near Coblenz, Germany. Genus EIFELASTER Schondorf. Eifelaster Schondorf, Palseontographica, vol. 56, 1909, pp. 70, 108, pi. 10, figs. 7,8. Remarks.—This genus is very closely related to Rhenaster and differs only in that there are small dorsal interbrachial areas between the adjoining proximal portions of the supramarginal columns, and these are filled with a small number of accessory ambital pieces. The outer portion of these ambital areas is made up of the two basal inframarginals that occupy the axils of the ventral side. o Fig. 10.—Rhenaster schwerdi, after SchOndgef. Schematic arrangement of abactinal plates. symbo
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