ECHINODERMATA - KU ScholarWorks - University of Kansas

BLASTOID STUDIES 81
159 162
FIGURES 158-163. Species of 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 of holotype (S4,958), X7.5; 159, partial cross
section of "C" ambulacrum (S4,957), X20; 160, part of
"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 of "C" ambulacrum, X15; 163, part of "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 of "B" ambulacrum ( X8). 5. Neotype
(new paratype), S4,963, Springer coll., U.S. Natl. Mus.;
Middle Devonian, Hamilton Group, Louisville, Kentucky;
oral view of 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 of "D" ambulacrum ( X20.8); 8, side
view of azygous basal plate ( X22.1) 72