ENPages
p.2
the head of alternating larger
[pencil sketch]
Lyriocrinus dactylus
and the succeeding plate is som
p.3
Lyriocrinus dactylus, Hall, Pal. of N.Y. Vol. 2 p 97. pl. 44 fig. 1; Marsu = piocrinus? dactylus Hall N.Y. Geol. Rep p 114 fig 4.
Column round, composed near the head of alternating larger and smaller joints, the larger projecting much be= yond the smaller ones; canal apparently round; surface of plates finely ornamented; pelvic plates small, pentagonal; costal plates heptagonal; scapulars hexagonal (in one of the five there is a double scapular and the succeeding plate is somewhat smaller than in the others); arm plates of the of form of the pelvic plates; hand= joints two, one above the other the lower somewhat cuneate, resting on each of the sloping upper sides of the arm=plate; fin= gers ten, composed of a double series of joints interlocking with each other, gradua= lly tapering to the extremity, The inter= mediate plates are uniform, with one ex=
p.4
ception; a quadrangular plate is inter= posed between the two seconds inter= scapular plates; this point is on the from opposite side from the supernumerary scapular; and both may be seen in fig 1= d; between each pair of fingers there are two small plates interposed at the base, directly above the interscapulars; and between the fingers of the same pair there is a single pentagonal plate interposed, similar to the larger of the two plates between the pairs of fingers.
D 13 - H 0.6
D. (of Column) 0.2
Middle Silurian - Niagara shale
Lockport N.Y.
p.1
4 p 329
Genus Macrostylocrinus, Hall, Paloeont. of N.York Vol. 2 p. 203. (1852)
Pelvic plates three, costals five, large; scapular plate, resting on the truncated upper edge of the costal, and supporting an arm=plate from which proceed a pair of arms; a single inter= scapular plate between two or more of the arms, succeeded by two inter= brachial plates.
Gr. markros, long, stylos, a style & krinon a lily.
p.2
large costal plates three of wh
[pen sketch]
Macrostylocrinus ornatus.
lower oblique edg
