726 THE CRINOIDEA CAMERATA OF NORTH AMERICA. 
but less so toward the root, and from stem fragments we have seen we judge 
that the stem must have been quite long. | 
Horizon and Locality. — Upper Burlington limestone, Burlington and 
Augusta, Iowa. 
Type in the White collection at Ann Arbor, Mich. 2 
emarks. —This is one of the most magnificent known species of Camer- 
Bi ate Crinoids, and one of the two finest specimens of it ever found at Bur- 
| | lington is in the British Museum. 
L a 
i 
| 
Eucladocrinus preenuntius W. and Sp. 
Plate LX XIII. Fig. 5. 
’ 
| 
| 1878. Platycrinus prenuntius —W. and Sp.; Proceed. Acad. Nat. Sci. Phila., p. 249, Plate 2, Figs. 1 and 
‘Bea | 2; also Revision, Part II., p. 74. 
. 
: oe 
| Of the type of Hucladocrinus pleuroviminus, but smaller, the tubular 
ips 25 . Onn 
PEF | extensions from the calyx much shorter, and giving off less than half the 
a | : number of arms. Dorsal cup saucer-shaped, its sides sharply angular. The 
ae lower part of the radials projecting over the deeply excavated basal disk, 
and not visible in a side view, or only the points of the angles visible, which 
Hild | are thickened and formed into rounded nodes. The margins of the radials 
| P| | are surrounded by a broad, thickened, rugose rim; while the space around | 
E the facets is depressed and without markings. The edges of the plates are s 
| profoundly beveled, producing deep channels all along the basi-radial and 
interradial sutures. 
| Basal disk pentangular, very deeply funnel-shaped below; the sides 
slightly concave; suture lines invisible. Radials rapidly spreading, twice as 
Yy | wide as long, moderately curving; the truncated upper faces but little slop- 
ing toward the regular interradial spaces, rather deeply at the anal side. 
aetna 
| Facet projecting, facing outward, semicircular, concave, very slightly notched 
iE at the upper end; the extreme outer margins striated. Costals wedge-shaped, 
y) not extending to the full depth of the facet. Distichals two, both quad- 
| rangular; the second narrower on top than at the bottom, its lateral outer 
I face giving off an arm to the side, the lateral inner face suturally united with 
that of its fellow of the adjoining division. The horizontal upper face sup- 
| ports four or five successive orders of brachials, each one consisting of two 
rather large pieces, and the upper one irregularly axillary ; one of the sides 
sloping and giving off an arm, the upper face the next order of brachials. 
