366 Wachemuth and Springer—Paleocrinordea. 
right sloping side of a large ete plate which stands in line 
with, and has about the size of t 
sloping side of the azygous plate is occupied by a second azy- 
gous piece, which in form, size and position closely resembles 
T 
only five arms, undivided, and apparently devoid of pinnules. 
he Russian form (fig. 2), is very similar to the American. 
radials, while its sloping right side supports the fifth radial, 
ich is much smaller and triangular, and taken together with 
the azygous piece as one plate th : 
our large radials, only that there is an arm facet and this 
P 3 Rs | 
Pa ake 
2 Sa RS 
oe 
sy EBeGe 
1, Berocrinus; 2, Hoplocrinus; 3, Hybocrinus; 4, Iocrinus. 
b, basals; 7, radials; a, azygous plate; «, special anal plate; ¢, plates of the tube. 
‘ie yg a Se 
ushed to one side. The Russian form, which is represented 
by Leuchtenberg’s Apiocrinus dipentas, was, curiously enough, 
regarded by Eichwald (Lethaea iain Band I, pp. copie. 
as identical with Homocrinus Hall, a genus with well-devel 
