ECHINODERMATA - KU ScholarWorks - University of Kansas

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BLASTOID STUDIES 117
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EXPLANATION OF PLATE 42
FIGURE PAGE
1-3. Poroblastus chouteauensis (PEcx), holotype, 1,290, Carl C.
Branson coll., Univ. Missouri; Lower Mississippian, Chouteau
Limestone, near Providence, Boone County, Mo.; oral,
"D" ambulacral, aboral views of specimen figured by
PECK (1938, pl. 28, fig. 18, labelled Orbitremites chouteauensis)
(all X5.2) 100
4-7,9,10. Ptychoblastus pustulosus FAY, holotype, 3,643 (figs
4-6), paratypes, 3,644 (fig. 10), 3,645 (figs. 7, 9), Fay
coll., Univ. Oklahoma; Mississippian, Warsaw Limestone,
12-15 feet below top, SW% NW% SW% sec. 9, T. 44 N.,
R. 5 E., Keyes Summit, St. Louis County, Missouri; 4-7,
oral, "D" ambulacral, aboral views (X6.3); 7,9, "EA"
interambulacral and reverse side of same (X6.3); 10, thin
section showing one hydrospire fold on each side of an
ambulacrum (X9) 100
8. Poroblastus granulosus (MEEK & WORTHEN), topotype,
S3,719, Springer coll., U.S. Natl. Mus.; Lower Mississippian,
Keokuk Group, near Warsaw, Ill.; polished cross
section showing one hydrospire fold on each side of an
ambulacrum (X6.6) 98