UNIVERSITY OF KANSAS PALEONTOLOGICAL CONTRIBITTIONS PLATE 26 ECHINODER MATA, ARTICLE 3 FAY-BLASTOID STUDIES
BLASTOID STUDIES 81 159 162 FIGURES 158-163. Species <strong>of</strong> Metab/astus ETHERIDGE & CARPENTER, Mississippian, Illinois, Missouri. 158-160. M. lineatus (SHumARD), Burlington Limestone Sagetown, Ill. (U.S. Natl. Mus., nos. S4,957, S4,958); 158, anal side <strong>of</strong> holotype (S4,958), X7.5; 159, partial cross section <strong>of</strong> "C" ambulacrum (S4,957), X20; 160, part <strong>of</strong> "C" ambulacrum, showing side plates (S4,958), X40. 161-163. M. wortheni (HALL), Warsaw Limestone, Boonville, Mo. (Buffalo Soc. Nat. Sci., unnumbered specimens); 161, summit and anal areas, X15; 162, cross section <strong>of</strong> "C" ambulacrum, X15; 163, part <strong>of</strong> "B" ambulacrum, showing side plates, X45. [Explanation.—An, anal opening; Bf, brachiolar facet; Bp, brachiolar pit; "C," amb.; C, canal (radial); CR, cryptodeltoid; "D," amb.; D, deltoid; D1, deltoid lip; H, hydrospire; HD, hypodeltoid; L, lancet; 0, oral opening; OSp, outer side plate; P, pore; Pf, pore furrow; R, radial; R1, radial limb; S, spiracle; Sp, main side plate; Su, superdeltoid.1 EXPLANATION OF PLATE 26 FIGURE PAGE 1-8. Eleutheroc-rinus cassedayi SHUMARD & YANDELL. 1 4,6. Neotype (new holotype), S4,960, Springer coll., U.S. Natl. Mus.; Middle Devonian, Hamilton Group, Beargrass Creek, Jefferson County, Kentucky; 1-4, oral, "A" ambulacral, aboral, "D" ambulacral views ( X4.3); 6, detail view <strong>of</strong> "B" ambulacrum ( X8). 5. Neotype (new paratype), S4,963, Springer coll., U.S. Natl. Mus.; Middle Devonian, Hamilton Group, Louisville, Kentucky; oral view <strong>of</strong> polished section wtih "A" ambulacrum directed upward (figured by ETHERIDGE & CARPENTER, 1886, pl. 19, figure 3) (X7.2).-7, 8. Plesiotype, 108, Univ. Illinois; Middle Devonian, Hamilton Group, Thedford, Ontario; 7, oral view <strong>of</strong> "D" ambulacrum ( X20.8); 8, side view <strong>of</strong> azygous basal plate ( X22.1) 72