PISOCRINIDAE 
79 
to note that the basals are visible from a side view, which is the only character that separates 
it from the Tennessee form. This appears in Mr. Miller’s figure i 8 , which is confirmed by 
the type specimen, now in my possession. With it are about 20 others from the Benedict col- 
lection, in several of which this character is shown, so that it may be accepted as reliable, 
although in the majority of specimens as found the basal plates cannot be made out. 
The species has been recognized at two localities in Tennessee in the upper part of the 
Brownsport group, and in the Bainbridge limestone of Missouri. 
Horizon and locality. In dolomite of Wabash and Madison counties. Northern Indiana; 
Lobelville formation; Flatwoods and Rise Mill, Perry County, Tennessee; Bainbridge lime- 
stone ; Ste. Genevieve County, Missouri. 
Pisocrinus sphericus Rowley 
Plate 2S, figs. 30-36 
Pisocrinus sphericus Rowley (P. glohosusf Ringueberg), Am. Geol., No. 34, 1904, p. 270, pi. 16, figs. 8, 9. 
Similar to P. quinquelohus in having the same minute basals, hidden at 
the bottom of a deep cavity, and very large lanceolate processes ; but with calyx 
globose in contour instead of lobate, not expanding upward, and perfectly round 
as seen from above or below. The distinction between the two forms is sup- 
ported by ample evidence, and in about 60 specimens of this species from a 
single locality, ranging from small to maximum size, there is no tendency to a 
lobate form. In Tennessee it occurs chiefly in the uppermost beds of the Beech 
River formation, probably passing up into the Lobelville; its horizon is usually 
different from that of quinquelohus. It also occurs in the Bainbridge formation 
of Ste. Genevieve County, Missouri, from which Rowley figured it with doubt 
as P. globosus of Ringueberg, but added tentatively a name of his own, which 
will stand. 
Horizon and locality. Brownsport formation, Niagaran ; clays at top of the Beech River, 
and base of Lobelville ; near Rise Mill, Perry County, and in Decatur and Wayne counties, 
Tennessee. Bainbridge formation ; Ste. Genevieve County, Missouri. 
Pisocrinus tennesseensis (Roemer) 
Plate 24, figs. 1-3 
Symbathocrinus tennesseensis Roemer, Sil. Fauna Westl. Tennessee, i860, pi. 4, figs. 6 a, b. — Wood, Bull. 64, 
U. S. Nat. Mus., 1909, p. 26. — Bassler, Bibliogr. Index, 1915, p. 1249. — Pisocrinus tennesseensis 
Wachsmuth and Springer, Rev. Pal., 3, 1886, pp. 166, 174. 
Attaining a large size — the largest known species. Calyx conical, usually 
wider than high. Column facet large, shallow, sharply indented, leaving a thin 
rim at the margin. Base broadly truncate; basals almost entirely confined to 
the column facet, only a small point of one occasionally seen. Radial facets very 
wide, narrowing inwards ; processes flat above, remarkably narrow at the con- 
nection with the radials, and widening both inward and upward, giving the 
effect of a mortise or dove-tailed union with the facets. They are so much under- 
cut that it is difficult to remove the matrix without prying them off. Specimens 
