52 THE UNIVERSITY OF KANSAS PALEONTOLOGICAL CONTRIBUTIONS syntypes). Rundle Limestone, Stoney Squaw Mountain (P. perelongatus type), and Cascade Mountain (P. grandis type), Alberta, Canada. Types.—Syntypes, 111,762, three specimens, U. S. National Museum, Washington. Plesiotypes, 8,914 (holotype <strong>of</strong> Pentremites grandis WARREN), one specimen; 8,915 (holotype <strong>of</strong> Pentremites perelongatus WARREN), one specimen, Geological Survey <strong>of</strong> Canada, Ottawa. Genus CARPENTEROBLASTUS Rowley, 1901 Type-species, by original designation.—Granatocrinus (Schizoblassus) magnibasis ROWLEY, 1895. Generic diagnosis (emend. FAY, herein).—Spiraculate blastoids with eight spiracles in addition to an anispiracle, located between epideltoid and hypodeltoid plates, lancet exposed along food groove proper, with ?two hydrospire folds on each side <strong>of</strong> an ambulacrum, one pore between adjacent side plates along deltoid and radial margins, base convex, radials overlapping deltoids, and calyx form conico-elliptical. Mississippian, Missouri, ?Kentucky. Remarks.—The genus Carpenteroblastus may have been derived from a form similar to Lophoblastus in which the three hydrospire folds atrophied to produce two folds on each side <strong>of</strong> an ambulacrum. CARPENTEROBLASTUS MAGNIBASIS (Rowley) Plate 37, figures 11-12; plate 45, figures 10-12; text-figs. 74-76 Granatocrinus (Schizoblastus) magnibasis ROWLEY, 1895, p. 220, figs. 11-14. Description.—Calyx calcitic, flattened ellipsoidal, with convex base in side view, strongly pentagonal in top view, 11 mm. long by 11.5 mm. wide, vault 9 mm. long, pelvis 2 mm. long, pelvic angle 130 degrees, periphery at midheight, summit flat. The stem is not well preserved, but is round, crenellar, and about 1 mm. in diameter. Basal circlet 1.5 mm. long by 6 mm. wide, pentagonal in basal view, convex outward, with large round ridges on each side <strong>of</strong> basiradial sutures, and with three normally disposed basal plates. Radials five, each hexagonal in side view, 9 mm. long by 5 mm. wide, with narrow, moderately deep sinus 7 mm. long by 1.5 mm. wide, with outward-projecting sides and rounded raised rims, giving a marked stellate appearance to the calyx in top view; radials overlapping deltoids. Deltoids four, large, broadly lancet-shaped, each 3.5 mm. long by 4.5 mm. wide, the adorai tips <strong>of</strong> each pierced by two separate spiracles, thus forming eight spiracles around the oral opening. On the anal side the anispiracle is located between a pentagonal epideltoid and pentagonal hypodeltoid; thus, a total <strong>of</strong> nine spiracles occur around the oral opening. Ambulacra five, long, linear, recurved below, each 13 mm. long by 1.5 mm. wide, with lancet exposed along food groove, the exposure being progressively wider toward the adorai end. There are 30 side plates in a space <strong>of</strong> 10 mm. along an ambulacrum, normally disposed, with one pore between plates, notched slightly in the sides <strong>of</strong> the deltoids and radials. There are four coverplate sockets to each side plate along the main food groove, and ?two hydrospire folds on each side <strong>of</strong> an ambulacrum. The surfaces <strong>of</strong> the calyx plates are ornamented by coarse growth ridges parallel to margins. Occurrence.—Lower Mississippian, upper part <strong>of</strong> Burlington Limestone, Louisiana, Missouri. Types.—Holotype, RX-194, one specimen, Rowley collection; metatypes, RX-22, three specimens, Rowley collection, Department <strong>of</strong> Geology, <strong>University</strong> <strong>of</strong> Illinois, Urbana. Genus CORDYLOBLASTUS Fay, n. gen. Type-species, by original designation (herein).—Pentremites acutangulus SCHULTZE, 1867 (adv. publ., 1866). Generic diagnosis.—Spiraculate blastoids with five spiracles, one <strong>of</strong> which is an anispiracle located between a superdeltoid and hypodeltoid, with two internal cryptodeltoids and large hypodeltoid, seen in side view, but the other four deltoids are overlapped by radials and not visible in side view, a single pore occurring between adjacent side plates along radial margins, lancet covered by side plates, four to nine hydrospire folds on each side <strong>of</strong> an ambulacrum; calyx club-shaped in side view. Devonian, Germany, Spain. FIGURE PAGE 1-3. Orophocrinus cam panulatus (I-Luvomcu), syntype, S3,236, coll. (purchased by SPRINGER), U.S. Natl. Mus.; Lower Mississippian, Chouteau Limestone, Sedalia, Mo.; oral, "D" ambulacral, aboral views <strong>of</strong> HAMBACH'S original figured specimen (all X3.1) 36 4-9. Orophocrinus stelliformis (OwEN & SHUMARD), neotypes, S4,961 (new holotype figs. 4,7,9, new paratype fig. 8), Springer coll., old number S3,234, U.S. Natl. Mus.; Lower EXPLANATION OF PLATE 13 Mississippian, Lower Burlington Limestone, Burlington, Iowa; 44, oral, "D" ambulacral, aboral views (all X2.5) (also figured by ETHERIDGE & CARPENTER, 1886, pl. 15, fig. 11); 7, oral view <strong>of</strong> oral plates <strong>of</strong> holotype, A indicating anal side ( X30); 8, anal view <strong>of</strong> new paratype showing anal covering plates in place between epideltoid and hypodeltoid plates ( X25); 9, detail view <strong>of</strong> "B" ambulacrum, mouth toward top, one outer side plate outlined in white ( X44) 36
UNIVERSITY OF KANSAS PALEONTOLOGICAL CONTRIBUTIONS ECHINODER MATA, ARTICLE 3 PLATE 13 3 7 9 FAY-BLASTOID STUDIES