p.3

Lecanocrinus macropetalus, Hall

Pal. of N.Y. Vol. 2 p. 199 pl. 45 fig. 1

Body sub- globose; pelvis composed
of three small plates; succeeded by five
costal plates of very large dimensions,
two of these are pentagonal, one reg=
ularly hexagonal, and two heptagonal;
a single sub= quadrangular intercostal
plate; scapular plates five, two of them
pentagonal, and three with a short
sixth side; a single interscapular plate;
arm=plates two, above which the plates
subdivided a second subdivison occur=
ing above the third or fourth plate
from the first division; extremities
of the fingers folded inward, leaving
an open cavity at the summit; column
round, composed of smooth, alternately
thicker and thinner joints which artic=
ulate strongly upon their outer margins;