ECHINODERMATA - KU ScholarWorks - University of Kansas

58 THE UNIVERSITY OF KANSAS PALEONTOLOGICAL CONTRIBUTIONS
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FIGURES 95-100. Species of Cribroblastus HAMBACH and Cryptoblastus ETHERIDGE & CARPENTER.
95-97. Cribroblastus cornutus (MEEK & WORTHEN), Upper
Mississippian, St. Louis Limestone, Illinois (Univ.
Illinois, no. X-361) and ?Warsaw Limestone, Fenton, Mo.
(U.S. Natl. Mus., no. S3,771); 95, summit area (no.
S3,771), X7.5; 96, cross section of ambulacrum (no.
S3,77I), X15; 97, part of ambulacrum, showing main
and outer side plates (no. X-361), X90. 98-100.
Cryptoblastus melo (OwEN & SHUMARD), Lower Mississippian,
Burlington Limestone, Burlington, Iowa (U.S.
Natl. Mus., no. S3,766, S4,959); 98, summit area (no.
S4,959), X7.5; 99, basal area (no. S4,959), X7.5; 100,
part of "D" ambulacrum, showing main and outer side
plates (no. S3,766), X37.5. [Explanation.-"A," amb.;
An, anal opening; "B," amb.; Bf, brachiolar facet; Bp,
brachiolar pit; "C," amb.; C, canal (radial); "D," amb.;
D, deltoid; "E," amb.; ED, epideltoid; H, hydrospire;
HD, hypodeltoid; L, lancet; 0, oral opening; OSp, outer
side plate; P, pore; R, radial; RI, radial limb; S, spiracle;
Sp, main side plate; Su, superdeltoid; Z, azygous basal.]
FIGURES 101-112. Devonoblastus tvhiteavesi REIMANN, Middle Devonian, Hungry Hollow Formation, Thedford and
Arkona, Ontario (Univ. Michigan, nos. 34,467, and 35,036; Buffalo Soc. Nat. Sci., no. E13,065; Geol. Survey Canada,
no. 3,661; U.S. Natl. Mus., no. S4,648), and Tichenor Limestone, New York (U.S. Natl. Mus., No. 142,025).
101. Summit area (no. 35,036), X15. 102. Anal
area, drawn from polished tangential section (no. 34,467),
x15. 103. Anal area, drawn from deep polished
tangential section (no. E13,065), X15. 104. Proximal
columnal, aboral view (no. 35,036), X15. 105.
Stem impression (no. 3,661), X15. 106. Partial cross
section of "E" ambulacrum (no. 34,467), X15. 107.
Cross section of "E" ambulacrum (no. E13,065), aboral
view, x15. 108. Cross section of "E" ambulacrum
(no. S4,648), oral view, X15. 109. Part of "C"
ambulacrum, showing side plates (no. 3,661), X40.
110. Part of "E" ambulacrum, showing side plates (no.
E13,065), X40. 111. Part of "A" ambulacrum,
showing side plates (no. 35,036), X45. 112. Part of
ambulacrum (no. 142,025), X30. [Explanation.-An, anal
opening; Bf, brachiolar facet; Bp, brachiolar pit; "C,"
amb.; C, canal (radial); CR, cryptodeltoid; "D," amb.;
Db, deltoid body; DI, deltoid lip; Ds, deltoid septum; 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;
Z, azygous basal.]