ii8 
SMITHSONIAN INSTITUTION 
narrowly acuminate. Lateral IBr 2. Main-axils of lateral arms 6. Outer 
ramules of axil-arms closely apposed, concealing- the main branches and inner 
ramules. Anal plates strongly convex, partly obscured by the closely adhering 
stem. Tube not visible. Stem fairly strong, with columnals 1.5 mm. long at 
about midway of the crown. 
Only the single type specimen is known, and that is from a slightly lower horizon than 
the preceding species. The crown is in the recumbent position, closely covering the stem which 
is almost enveloped by the smaller axil-arms. The striking character by which the species 
differs from almost all others of the genus is the repeated bifurcation of the median arm, in 
which it anticipates the later Carboniferous forms. 
Horizon and locality. Coccocrinus zone of the Beech River formation, Brownsport 
group, Niagaran ; West of Tuck’s Mill, Decatur County, Tennessee. 
Calceocrinus stigmatus Hall 
Plate 2g, fig. 16 
Cheirocrinus stigmatus Hall, Trans. Alb. Inst., 4, 1863, p. 225; Calceocrinus stigmatus Hall, 28th Rep. 
New York St. Mus., 1879, p. 147, pi. 19, figs. 9-11; nth Ann. Rep. Indiana Dep. Geol., 1882, p. 281, 
pi. 19, figs. 9-1 1. 
Copy of Hall’s figure of the type, to show the occurrence of the form in the Waldron 
formation of the Silurian. Only the radial part of the calyx is preserved, showing a wide 
separation of the segments of 1. ant. compound radial. This will distinguish it from Eucheiro- 
crinus, but not from Halysiocrinns, and the other characters are not in sufficient detail for com- 
parison. The geological position, however, raises a fair presumption against the latter. The 
species is extremely rare, no other specimens having been found. 
Waldron shale, Niagaran ; Waldron, Indiana. 
Calceocrinus typus Ringueberg 
Plate 2g, figs. 17, 17a 
Calceocrinus typus Ringueberg, Ann. New York Acad. Sci., 4, 1889, p. 402, pi. 10, fig. 8. 
Ringueberg’s type specimen, now in my collection, is figured to illustrate 
the typical form as recognized among the New York specimens. It has the axil- 
arms of the type of C. foerstei and C. tenax, and the disconnected segments of 
1 . ant. R. 
From the Rochester shale of the Niagaran ; Lockport, New York, where it is one of the 
rarest fossils. 
In addition to the two foregoing species Ringueberg described Calceocrinus bidentatns 
and C. contractus, both from the Niagaran at Lockport, New York. 
Calceocrinus Hall 
Plate 2g, fig. i8 
Hall, Pal. New York, 2, 1852, p. 352, pi. 85, fig. 5 - 
The original figure upon which the genus was proposed. After Hall. It is 
figured here for comparison with C. lialli and C. typus, identified as congeneric 
with this. 
Horizon and locality. Rochester shale; Lockport. New York. 
