Carnerate Crinoids. — Wachsmuth and Springer. 139 
terradial .and interdistichal spaces formed into sharp edges by 
means of corresponding depressions in the dorsal cup and teg- 
men. Costals and distichals marked by rounded, longitudinal 
ridges, following the median line of the plates. Ventral disk a 
little higher than the dorsal cup, its lateral margins slightly bulg- 
ing, the lower end somewhat projecting over the upper margin of 
the dorsal cup. The plates flat, their surfaces in well preserved 
specimens densely covered by fine granules. 
Inf rabasals small, hidden by the column ; forming a flat, pen- 
tagonal disk. Basals rather large, about as wide as high, curv- 
ing abruptly upwards ; the posterior one slightly truncated at the 
upper end; the interbasal suture lines distinctl}' grooved. Ra- 
dials twice as wide as high, their proximal ends distinctly an- 
gular. First costals much shorter and narrower than the radials, 
quadrangular. Second costals higher and a little wider than the 
first; their lateral faces short; thp sloping upper faces placed at 
right angles. First distichals as large as the axillary costals, 
followed by two or three cuneate plates in the calyx, which 
slightly interlock. Structure of the arms not observed, but they 
were undoubtedly biserial and pendent. First interbrachials of 
the regular sides the largest plates of the calyx; they reach up 
to the sides of the first distichals and are succeeded by two rows 
of two plates each. The anal plate a little higher than the radials, 
supporting three, two and two smaller plates. Interdistichals 
one, small. Posterior oral nearly central, large and extended 
into a heavy, short spine; the four other orals proportionally 
small and almost flat. Radial dome plates represented by plates 
of a first and second order, those of the latter by two or three 
plates to each division, alternately arranged; all large and spine- 
bearing. The spines near the outer margins of the disk directed 
obliquely outward, and visible in a dorsal aspect of the calyx. 
Interambulacral plates numerous, of the size of the smaller 
orals, and irregularly arranged. Anus excentric, placed at the 
top of a large ovate protuberance, which rises conspicuously 
above the general plane of the disk. 
Horizon and Locality: Niagara group; St. Paul, Shelby Co., 
Indiana. 
Type in the collection of Wachsmuth and Springer. 
EUCALYPTOCRINUS LINDAHLI W. and Sp. (UOV. SpCC. ) 
Above medium size. Most remarkable for its heavy, rounded 
