26 
SMITHSONIAN INSTITUTION 
Macrostylocrinus granulosus Hall 
Plate 4, figs. lo-ig 
Macrostylocrinus striatus var granulosus Hall, 28th Rep. New York St. Mus., 1870, p. 129. — Wachsmuth 
and Springer, N. A. Crin. Cam., 1897, p. 289, pi. 22, figs. 15a, b. — Bassler, Bibliogr. Index, 1915, 
p. 782, 783- 
There is here illustrated a form with turbinate calyx, expanding upward 
as most frequent in the genus, in which the tegmien is also beautifully preserved 
in two specimens. This is of a somewhat ditferent type, in accord with the more 
spreading form of the calyx, in which the ambulacra tend to become wider, 
and the anal opening very much larger ; it is situated in the depressed posterior 
interambulacrum between the margin and the center, and in one specimen is 
closed by a pyramid of small plates. The granulose surface, completely devoid 
of striae, together with the general form and proportions, seems to indicate the 
reference to this species. It is very small, as is best seen by comparing the draw- 
ings, which are mostly double size. 
Horizon and locality. Waldron shale, Niagaran ; Madison, Indiana, Newsom and perhaps 
Decatur County, Tennessee. 
Macrostylocrinus laevis new species 
Plate 4, figs. 14-19 
This name is suggested to designate a smooth form occurring rather plen- 
tifully in the Beech River formation, having relatively small RR and wide IBr, 
and in which we have the stout biserial arms partl}^ preserved. 
Horizon and locality. Beech River formation, Niagaran; Decatur County, Tennessee. 
Macrostylocrinus meeki (Lyon) 
Plate 4, figs. 20-22 
Actinocrinus meeki Lyon, Proc. Acad. Nat. Sci. Phil., i86i, p. 411, pi. 4, figs. 4a, b. — Macrostylocrinus 
meeki, Wachsmuth and Springer, Rev. Pal., 2, p. 103 ; N. A. Crin. Cam., 1897, p. 290, pi. 22, figs. i6a, b. 
A broader and more rotund calyx than usual in the genus, and notable for 
the sharp median ridges which follow the rays from radials into arm-bases; it 
may also be more or less striate. 
Horizon and locality. Louisville limestone ; Jefferson County, Kentucky, and Black River 
formation, Niagaran ; Decatur County, Tennessee. 
(?) Macrostylocrinus pustulosus new species 
Plate 4, figs. 2 g, 2 ga 
It is not clear that this unique specimen belongs to the genus. The general 
contour and pustulose ornament would seem to be exceptional, while the arrange- 
ment of the anal side is consistent with the reference. In the large side of 
the RR it bears considerable resemblance to the early Platycrinidae, and if we 
had the teginen preserved it might be found to go with Cnlieoerimis. 
