Pages
Ichthyocrinus Burlingtonensis
Ichthyocrinus Conrad - Hall
Iowa Rep. 1 p 557. (1858)
I. Burlingtonensis, Hall, Iowa Rep 1 p 557 Fig 75
Burlington Limestone
Burlington Iowa.
p.1
4 p 319
Genus Lecanocrinus, Hall, Palaent. of N.York, Vol. 2 p. 199 (1852)
Pelvis composed of three plates; second series consisting of five, with an intercalated plate; third series, or scapular plates broad, with an interscapular plate in the same range; arms with two joints, above which are several sub= divisions closely arranged, the plates uni= ting laterally without interlocking.
Gr and krinon lily
p.2
Lecanocrinus macropetalus, Hall
Pal. of NY. Vol. 2 p. 199 pl. 45 fig. 1
Body sub- globose; pelvis composed of three small plates; succeeded by five
imensions,
[pencil sketch]
l, one reg=
ptagonal;
ntercostal
two of them
Lecanocrinus macropetalus
a short
pular plate;
arm=plates two, above which the plates subdivided a second subdivision 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;
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;
p.4
Canal rounded, with sometimes indications of a tripetalous form
H. 1.3 - D 1.0 - D. of column 0.13
Medial
Middle Silurian - Niagara shale
Lockport N.Y.