ACTINOCRINID&. 655 
Teleiocrinus liratus Hatt. 
Plate LX. Fig. 8. 
1861. <Actinocrinus Liratus — Hati; Suppl. Geol. Rep. Iowa, p. 1 (figured 1872, Bull. I. N. Y. State Mus. 
Nat. Hist., Plate 4, Fig. 3). | 
1861. Strotocrinus liratus — Mux and WortuEn; Geol. Rep. Illinois, Vol. II., p. 190, and 1873, ibid., i |: 
Vol. V., p. 355, Plate 7, Figs. 2a, 0, c. | 
1881. Teleiocrinus liratus —W. and Sr.; Revision Paleoer., Part IL., p. 149. : . i 
Syn. Actinocrinus subumbrosus Hatt; 1860, Suppl. Geol. Rep. Iowa, p. 3. 
Larger than the two preceding species, the calyx more elongate, the teg- 
men higher, the anal tube much heavier, the ornamentation less rugose, and 
the column stronger and circular instead of angular. Calyx urn-shaped, 
elongate-obconical to the base of the rim. Sides of the dorsal cup expand- 
ing gradually from the basals to the top of the distichals; the rim decagonal, 
curving obliquely outward and upward, conspicuous but not broad. Sur- 
face of plates slightly convex, covered with well defined radiating ridges, 
which in parallel sets of three or four unite at the middle of the plates in 
small, transverse or arched, angular nodes, producing a neatly sculptured 
ornamentation. 
Basals forming a broad and deep, gradually expanding cup, slightly thick- 
ened at the lower margins; the interbasal sutures somewhat depressed, but 
not actually grooved. MRadials generally a little longer than wide. First 4 
costals rarely more than one third the. size of the radials; the second as 
large as the first, and both as long as wide. Distichals slightly smaller \ 
than the costals. The branching of the two main divisions takes place 4 
from opposite sides, as usual in the genus; there being five bifurcations | \ 
in each division, or twelve arms to the ray. Arms of moderate size, some- 
what flattened on the back, and covered with four rows of rather faint “ 
nodes. Interdistichals generally nine: 1, 2, 2, 2,2, at the regular sides, 
and about thirteen at the anal side. Anal plate as large as the radials. 
Interdistichals one. Ventral disk higher than in the preceding species, 
gently curving upward from the margin of the rim, and gradually pass- 
ing into the anal tube; its outer margin distinctly plicated. It is com- 
posed of numerous irregularly arranged plates, small pieces being interposed 
between larger ones, but, as a rule, the plates decrease in size toward the 
arm bases. Orals indeterminable. Anal tube very long and large through- 
out; composed of similar plates to those of the disk, but they are smaller 
80. 
