| 
518 THE CRINOIDEA CAMERATA OF NORTH AMERICA. 
Basals small, only their upper angles exposed beyond the column. Radi- 
als and costals nearly of uniform size. Distichals two, a little smaller than 
the costals. Palmars five or six in the calyx, comparatively large, very 
gradually decreasing in size; succeeded by free arm plates of the same 
order. Arms twenty, not branching, slender, cylindrical, composed of short 
cuneiform pieces. Interbrachials: 1, 2, 8, 2, 2, 2, ec. ; the anal side wider, 
containing a longitudinal row of anal plates marked by a strong ridge. 
Interdistichal and interpalmar areas unusually large, the former composed 
of five or more rows. Construction of ventral disk not known. Column 
quadrangular, with rounded angles and slightly concave sides. | 
Horizon and Localily.— Upper part of Hudson River group, Waynes- 
ville, O. 
Zype in the collection of I. H. Harris, Esq., at Waynesville. 
Compsocrinus miamiensis (8. A. Mitzzr). 
Plate XXI. Figs. 7a, b. 
1882. Glyptocrinus miamiensis —S. A. Minter; Journ. Cincin. Soc. Nat. Hist., Vol. V., Plate 1, Fig. 1. | 
1883. Glyptocrinus miamiensis— W. and Sp.; Amer. Journ. Sci., Vol. XXV., p. 265. 
1883. Glyptocrinus miamiensis —S. A. Mitimr; Journ. Cincin. Soc. Nat. Hist., Vol. VI., p. 224. es | 
1885. Glyptocrinus miamiensis — W. and Sp., Revision Paleeocr., Part III., p. 104. | 
‘Calyx elongate; the rays followed by strong ridges, which occupy one - 
half the width of the plates. There are no ridges upon the interbrachials | 
or upon any of the other plates, the surface of the calyx is covered with 
minute, irregularly arranged pustules, which are not readily seen except 
under a magnifier. 
largest and broadly truncated above; the truncate face of the anterior 7 
Basals moderately large, forming a good-sized cup; the posterior one | 
one somewhat narrower; the two others forming a right angle. Radials | 
i) S : and costals of about equal size, but in the former the proximal side is 
1 ‘} ’ angular, in the others the distal. The posterior rays have two large dis- 
| tichals, followed by three to four palmars which support the arms; the 
three anterior rays have from four to five distichals in the calyx and no 
palmars, giving fourteen arms to the species. Interbrachials: 1, 2, 2, 2, 2, 
etc. The anal side has an additional row of anal plates following the median 
line. Structure of ventral disk and anal opening unknown. Column ob- 
i scurely quadrangular, with a small pentangular canal. 
