MELOCRINIDAE 
31 
farther apart and afford a view of the close fringe of pinnules, which are 
scarcely visible in the preceding species. The calyx is relatively broader, and 
the nodes upon the cup plates are very conspicuous, especially the single large 
iBr which by its central node stands out distinct from the others. One specimen 
is characterized by excessively large radials. 
Horison and locality. Beech River formation, Niagaran ; Decatur County, Tennessee. 
Allocrinus benedicti S. A. Miller 
Plate 6, figs, ii, 12 
Allocrinus benedicti Miller, 17th Ann. Rep. Indiana Dep. Geol., 1892, p. 647, pi. 7, fig. i. — Wachsnnith and 
Springer, N. A. Crin. Cam., 1897, p. 308, pi. 24, figs. 8a, b. 
Miller’s figure gave no idea of generic or .specific characters, being made 
from a fragment. I am figuring two good crowns to show the form as it occurs 
in the Laurel, in which the calyx plates are more broadly rounded and the arms 
rather less robust than in the type. 
Horizon and locality. Laurel limestone, Niagaran ; St. Paul, Indiana. 
PATELLIOCRINUS Angelin 
Plate 6 
Patelliocrmus Angelin, Icon. Crin. Suecc. 1878, p. i. — Zittel, Handb. Pal., 1879, P- 3^8. — Wachsmuth and 
Springer, Rev. Pal., 2, 1881, p. 100. — Bather, Treatise on Zool., 3, 1900, p. 162. — Zittel-Eastman, 
Textb. Pal., 2d ed. 1913, p. 191. — Jaekel, Phylogenie und System, 1918, p. 36. 
BB 3, unequal. Dorsal cup elongate. No anal plates ; iBr few. Arms biserial 
or cuneate uniserial. 
Genotype. Patclliocrinits pacliydactylns Angelin. 
Distribution. Silurian ; Gotland, America. 
This Gotlandian genus, now for the first time doubtfully recognized in America, while 
having a simple calyx with 3 BB and a large iBr with anal side not dift'erentiated, is widely 
separated from the preceding by its elongate, conical cup and biserial arms. Angelin de- 
scribed 9 species in which there is considerable confusion of generic characters. The figures 
cannot be depended on (Bather, Crinoidea of Gotland, p. 5) for details, and it is hard to tell 
exactly what should be considered as tbe type. But I have taken P. pinnulatiis, pi. 24, fig. 5. 
as a fair representative, and there is among several of the species a general similarity which 
seems to warrant the reference of our species, in default of anything better. 
Patelliocrinus ornatus new species 
Plate 6, figs, ig-i pa 
The surface, as shown by several specimens, is almost invariably ornate, 
with variations in intensity due to erosion or growth. It is best shown by 
figs. 15, 15a, from a free specimen unusually well preserved, in which the stout 
biserial arms and crowded pinnules are in place. The relatively small radials 
