464 
PALAEONTOLOGY OF ILLINOIS. 
ORGANS OF UNCERTAIN AFFINITY. 
j Genus PALaEOXYRIS, Brgt. 
\ .. 
Ann. Sc. Nat., xv., p. 466. 
Spindle-shaped strobiles, covered with closely imbricated 
rhomboidal scales, disposed in spiral order, the inferior ones 
passing to an angular pedicel, the upper ones lengthened into 
linear appendages. 
This description is copied from Unger’s genera, and though inappropriate 
for the classification of the species referred to it, this genus is preserved, with 
its diagnosis, for the good reason that, as will be seen hereafter, the true nature 
of these organs is unknown. 
PaLaEOXyris Prendeli, Sp. nov. 
PI. xxvii, fig 10 and 12. -~- 
A spindle or bottle-shaped body, appearing like a flattened 
small bladder, enlarged in the middle, tapering into a long 
neck, more abruptly rounded and narrowed downwards into 
an obtuse point, surrounded by a double line of thin but deep 
filaments or striae, scarcely half a line distant, often close to 
each other, ascending in spiral form from the basilar point, at 
first in an obtuse angle with the borders, but elongating up¬ 
wards and ascending into the neck where they become nearly 
parallel to its sides. The surface of this capsular body is 
formed of a thin pellicle, and by its compression, the spiral 
lines of both sides are marked upon it, thus forming, by their 
crossings, a trellis of more or less enlarged rhomboidal divi¬ 
sions. In ascending into the neck, the spiral lines approach' 
