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PLATYCRINID&. 659 
Platycrinus insolens Rowzzy and Harz. 
Plate LXXI, Fig. 15. 
1891. Kansas City Scientist, p. 98, Plate 2, Fig. 4. 
Type of P. burlingtonensis ; described from the basals and radials. These 
plates form a moderately small, spreading cup, with very slightly convex, 
nearly straight sides, and broadly truncated base; cross-section near the 
upper end obscurely pentangular. Plates rather strong. | 
Base saucer-shaped ; upper face produced into sharp angles; lower face 
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perfectly flat, spreading outward into a short, well defined rim, fully twice 
as wide as the column, and somewhat fluted at the margin; column facet 
round. Interbasal sutures invisible; basi-radial and interradial sutures 
slightly depressed. Radials about one fifth wider at the top than at the 
bottom, their length equal to their greatest width; longitudinally convex, a 
little contracted at the upper end; the faces supporting the interradial pieces 
almost horizontal, and but slightly truncated at the anal side. Articular 
facets occupying one third the width of the plates; directed obliquely upward, 
their surfaces being covered with fine radiating striae and an obscure trans- 
verse ridge, but without perforation. 
Horizon and Locality. — Chouteau limestone; near Curryville, Mo. 
Types in the collection of Mr. Rowley. 
femarks. — This species resembles P. equiternus Miller; but the latter 
has a more concave base, the facets of the radials are more projecting and 
directed almost horizontally. It also approaches P. Britis’, but the radial 
facets are much wider and larger generally. 
Platycrinus Britsi 8. A. Mrxuer. 
Plate LXXI. Fig. 10. 
1891. §S. A. Mitrer; Bull. No. 4, Geol. Surv. Missouri, p. 28, Plate 3, Figs. 3 and 4. 
Comparable with P. cguiternus Miller, and P. isolens Rowley and 
Hare. Of medium size. Calyx to the top of the radials cup-shaped, - 
wider than high, broadly truncated at the bottom, the sides convex, 
more ‘rapidly expanding at the basals than at the radials. Plates thick, 
