PISOCRINIDAE 
77 
his opinion as to the probable identity of some of them with P. hencdicti and some other 
American species will be shared by every one who has looked for reliable characters for dis- 
tinguishing them in our own collections. 
Horizon and locality. Dolomites of Wabash, IMarion, Anderson, Northern Indiana; 
Osgood and Laurel ; St. Paul and other localities in southern Indiana. Laurel and Browns- 
port formations ; Rise Mill and Flatwoods, Perry County ; Martin’s Mill, Sinking Creek, 
Wayne County; Tuck’s Mill and various glades in Decatur County, Tennessee. 
Pisocrinus benedicti S. A. Miller 
Plate 24., figs. 28-36 
Pisocrinus hencdicti Miller, 17th Ann. Rep. Indiana Dep. Geol., 1892, p. 639, pi. 6, figs. 13-16 (adv. sheets, 
1891, p. 29). — Slocom, Field Columb. Mus., 2, Geol. Ser., igo8, p. 279, pi. 84, figs. 8-1 1. 
Any rather small, globose or ovoid form, expanding upward, with fairly 
wide radial facets and low, square or slightly widening processes, in which the 
basals are only slightly visible — in other words, which is not campana — may 
be taken as this species. To judge by the material from the type localities in 
northern Indiana used by Mr. Miller and bearing' his labels, it is a rather gener- 
alized form, without any very distinctive characters. I have referred to it with 
doubt specimens from the Brownsport group in Tennessee, with a considerable 
range of variation in general form from ovoid to oblate. Slocom has recog- 
nized it in the dolomites of the Chicago area, and more recently in MS. from 
the Bainbridge formation in Missouri. None of these identifications are made 
with much confidence because the species as described is unsatisfactory. 
Horizon and locality. Dolomites of Wabash and Madison counties, northern Indiana; 
Brownsport group of Decatur, Perry counties, Tennessee ; Bainbridge limestone, Ste. Gene- 
vieve County, Missouri. 
Pisocrinus quinquelobus Bather 
Plate 23, figs. i6-2p 
Haplocrinites hemisphcricus Troost, Am. Jour. Sci., 1849, P- -420; Proc. Am. Assn. Adv. Sci., 1850, p. 61 
(nom. nud.). — Pisocrinus gorbyi (in part) Miller, 17th Rep. Ind. Dep. Geol., 1892, p. 640, pi. 6, 
figs. 21-23. — Pisocrinus quinquelobus Bather, Grin. Gotl., 1893, pi. 27; Am. Geol., 1896, p. 184. — 
Slocom, Field Columb. Mus., 2, Geol. Ser., 1908, p. 280, pi. 84, figs. 5-7. — Pisocrinus milliganae Miller 
and Gurley, Bull. 7, 111 . St. Mus., 1896, p. 80, pi. 5, figs. 27, 28.— Miller, N. A. Geol. Pal., 2d App., 
1897, p. 749, figs. 1369, 1370.— Foerste, Jour. Geol., 1903, p. 712.— Wood, Bull. 64, U. S. Nat. Mus., 
1909, p. 28. 
A medium sized species, exceptionally attaining a width of 8 mm. Calyx 
much wider than high, measured from the level of the arm-facets, height to 
width of an average specimen being 3 by 5.5 mm.; cup conical, 5-lobed with 
interradial depressions, expanding upward, and the large radials recurving into 
an inverted basal funnel. Basals entirely hidden at bottom of funnel, covered 
by a narrow column. Radial facets narrow, dove-tailed to receive wedge-shaped 
processes; processes very large spear-head shape, sometimes petaloid. Arms 
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