80 THE UNIVERSITY OF KANSAS PALEONTOLOGICAL CONTRIBUTIONS periphery well above mid-height at radial lips. The stem impression appears to be round, 0.75 mm. in diameter, in slight concavity. Basal circlet short, flattened conical in side view, trangular in basal view, 3 mm. long by 3 mm. wide, with flat triangular aboral base each side <strong>of</strong> which is 1.5 mm. wide. Radials fi ve, hexagonal in side view, each 8.5 mm. long by 2.5 mm. wide, with short, wide, deep sinus 3 mm. long by 1.75 mm. wide by 0.5 mm. deep, with limbs shorter on anal side than on other sides; radials overlapping deltoids. Radials and basais flare. Deltoids four, short, triangular, barely visible in side view, each 1.5 mm. long by 1 mm. wide, with a paired spiracle at adorai ends <strong>of</strong> each. On the anal side there are four deltoid plates—a superdeltoid adjacent to the oral opening, homologous with the deltoid lip <strong>of</strong> each <strong>of</strong> the other four deltoids, two cryptodeltoids resting on the aboral surface <strong>of</strong> the superdeltoid, internally separating the anal opening from the adjacent hydrospire canals, and a hypodeltoid that covers the cryptodeltoids and abuts against the adjacent radial limbs. A paired anispiracle is present on the anal side; thus five paired spiracles occur around the oral opening, that is, four paired spiracles and a paired anispiracle. Ambulacra five, short, linear, each 4 mm. long by 1 mm. wide, with lancet covered by side plates, and 40 side plates in space <strong>of</strong> 10 mm. along an ambulacrum. Side plates not well preserved but appearing to be normally arranged. Surfaces <strong>of</strong> calyx plates ornamented by fine growth lines subparallel to plate margins. Occurrence.—Upper Mississippian, Salem Limestone, Lanesville, Indiana. Types.—Syntypes, 6,284, two specimens, Gurley collection, Walker Museum, <strong>University</strong> <strong>of</strong> Chicago. METABLASTUS VARSOUVIENSIS (Worthen) Plate 19, figure 9; plate 50, figures 1-3; plate 52, figure 6 Pentremites (Tricoelocrinus) varsotsviensis MEEK 8c WORTHEN, 1875, p.521, pl. 31, figs. 8-9. Description.—The types are fragmentary. The small syntype is 11.5 mm. long by 6 mm. wide, with vault 6.5 mm. long, pelvis 5 mm. long, and pelvic angle 65 degrees. The large syntype is 15 mm. long by 9 mm. wide, with basals destroyed. The above proportions serve to distinguish this species from all others. Radial bodies and basais slightly flared. Occurrence.—Upper Mississippian, Warsaw beds, Monroe County, Illinois. Types.—Syntypes, 1,885 (old no. <strong>of</strong> the Illinois State Museum), two specimens, Worthen collection, Illinois Geological Survey, Urbana. METABLASTUS WACHSMUTHI (Gurley) Plate 51, figures 1-2,5 Troostocrinus wachsmathi GURLEY, 1884, p. 1. Description.—Calyx calcitic, poorly preserved, bipyramidal in side view, 42 mm. long by 16 min. wide, with vault 13.5 mm. long, pelvis 28.5 mm. long, pelvic angle 25 degrees, periphery at radial lips above mid-height, and with flat wide triangular base 5 mm. wide on each side. Stem impression not well preserved. Basal circlet long, flattened basally, conical in side view, pentagonal in basal view at basiradial sutures, gradually tapering to an equilateral triangle at base. Radials five, long, hexagonal in side view, each 28 mm. long by 8.5 mm. wide, with short, wide, deep sinus 12 mm. long by 4 mm. wide by 2 mm. deep; radials overlapping deltoids. Radial bodies and basais slightly flaring. Deltoids four, short, not visible in side view, triangular, each 4 mm. long by 2 mm. wide, with adorai tips notched by a V-shaped paired spiracle. On the anal side are four anal deltoids, a superdeltoid, two cryptodeltoids, and a hypodeltoid. The short, wide, curved superdeltoid is adjacent to the oral opening, overlapped on its aboral surface by the two cryptodeltoids which internally separate the anal opening from the adjacent hydrospire canals. The pentagonal hypodeltoid is missing but the facets for its reception are present. The adorai ends <strong>of</strong> the radial limbs on the anal side overlap the cryptodeltoids, and the hypodeltoid covers the cryptodeltoids on the EXPLANATION OF PLATE 25 FIGURE PAGE 1-12. Devonoblastns whiteavesi REIMANN, Middle Devonian, Hungry Hollow Formation (coral zone) Ontario, (except fig. 6).—1 3, 7. Topotype, 35,036, Charles Southworth coll. Univ. Michigan; Hungry Hollow <strong>of</strong> Ausable River Valley, 2.5 miles northeast <strong>of</strong> Arkona, Ontario; 1-3, oral, "D" ambulacral, aboral views (X4.6); 7, detail oral view <strong>of</strong> same specimen ( X 17).-4. Plesiotype, 34,467, Charles Southworth coll. Univ. Michigan; tileyard about 0.5 mile north <strong>of</strong> Thedford, Ontario; oral view <strong>of</strong> polished summit showing anal opening (black) with cryptodeltoids on either side and superdeltoid on adorai side ( X13.2). —5,9. Plesiotype, E13,065, Charles Southworth coll. Buffalo Soc. Nat. Sci.; near Thedford, Ontario; 5, hydrospires from interior side ( X8); 9, aboral view <strong>of</strong> thin section with "E" ambulacrum directed upward (X8.2). —6. Plesiotype, (accession no.) 142,025, U.S. Natl. Mus.; Middle Devonian, Tichenor Limestone (shaly layer), Cazenovia Creek, Springbrook, Erie County, New York; detail ambulacral view (X11). 8. Plesiotype, S4,648, Springer coll., U.S. Natl. Mus.; Ausable River area, 2 miles east <strong>of</strong> Arkona, Ontario; oral view <strong>of</strong> polished section with "C" ambulacrum directed downward ( X5.6).— 10-12. Plesiotype, S4,144, Springer coll., U.S. Natl. Mus.; Marsh's Mill, Arkona, Ontario; aboral, "D" ambulacral, oral views (X4.4) 52
UNIVERSITY OF KANSAS PALEONTOLOGICAL CONTRIBUTIONS Fc NODER MATA, ARTICLE 3 PLATE 25 FAY-BLASTOID STUDIES