352 
PALAEONTOLOGY OF NEW-YOBK. 
after the letter-press and plates of this species had been finished, and therefore too late 
to be cited in the body of this work. 
CALCEOCRINUS (new genus). 
Plate LXXXY. Pigs. 5 & 6. 
This peculiar crinoid presents the point of attachment for the column, and a portion 
which appears to be the base or pelvis, in which a separation into two plates only is 
visible. One of the plates is convex, the other nearly flat or concave, both having the 
upper margins slightly serrated. 
In general appearance, this fossil has the character of the root of a crinoid; but from 
finding many of the same form, and always free, it would appear to belong to the ter¬ 
minal portion of the animal. It is probable that the plates are so closely anchylosed as 
to obscure or obliterate the lines of suture. 
Other specimens and farther examinations are required to decide the character of this 
fossil. 
EUCALYPTOCRINUS. 
Plate LXXXY. Fig. 7. 
This figure represents a side view of one of the solid arms and tentacula of this fossil. 
It presents some features differing from the figure on Plate xlvii. 
609. 1. PALiEASTER NIAGARENSIS. 
Reference p. 247 of this volume, PI. li, figs. 21-23; also PL Ixxxv, figs. 8, 9 & 10. 
Pig. 8 represents the lower side of the extremity of one of the arms of this species, 
which is more obtuse than usual. 
Pig. 9 : the upper side enlarged, showing the character of the tubercles upon the sur¬ 
face. 
Fig. 10 represents the arrangement of the ossicula and tubercles on the lower side, the 
space on one side of the centre being shown. 
723. 2. TENTACULITES NIAGARENSIS ( n. sp.). 
Plate LXXXV. Figs. 11 & 12. 
Slender, acute : annulations rounded, eight or nine in the space of } of an inch ; in¬ 
termediate spaces marked by transverse rounded striae. 
Pig. 11. Specimen natural size. Pig. 12. A portion of the same enlarged. 
The description and figure of this species were accidentally omitted in its proper place. 
