414 OLDER MESOZOIC FLORAS OF UNITED STATES. 
these peculiarities. When inverted and laid on its back, the terminal 
bud down and the base uppermost, it has much the shape of a broad, 
low, wooden shoe or sandal, the thicker end representing the heel and 
the thin, flattened end, which is a sort of terminal bud of one of the 
lateral branches, representing the toe — a comparison which suggested 
the specific name. 
It weighs 1.45 kilograms. 
Pl. CLXIII is a view from the top downward, and Pl. CLXIV from 
the bottom upward. 
CycaDELLA GELIDA Ward. 
Pls. CLXV-CLXIX. 
1900. Cycadella gelida Ward: Proc. Wash. Acad. Sci., Vol. I, p. 281. 
Trunks rather large and relatively tall (the largest of the specimens 
39cm. high, 12 by 20 cm. in diameter), subcylindrical, slightly diminish- 
ing from base to summit, laterally compressed, having a few secondary 
axes, terminating in a large conical bud, the base projecting; rock of 
medium hardness and specific gravity, light brown on weathered sur- 
faces, nearly black within and on freshly exposed portions; organs of 
the armor slightly ascending; rows of scars from left to right making 
an angle with the axis of 45°, those from right to left of 50°; leaf scars 
subrhombic, 20 to 25 mm. wide, 8 to12 mm. high; leaf bases rough and 
punctate; walls 1 to 2 mm. thick, friable, white, with a median line or 
crack; reproductive organs well developed, usually raised or projecting, 
elliptical in cross section, 2 by 3 cm. in diameter or larger, the involu- 
cral bracts not visible, the central portions solid and amorphous; armor 
1 to 3 cm. thick, joined to the axis by a more or less definite line, all 
within it a black undifferentiated mass of cherty and apparently struc- 
tureless matter which tends to crack into cubes or flake off. 
The large fine specimen, No. 500.1, scarcely injured by being broken 
in two by an obliquely transverse fracture near the base, was at first 
supposed to be altogether unique, but in my efforts to correlate the 
fragment, No. 500.24, of a considerably smaller trunk, I found that it 
had scarcely any affinities except with this, and upon a thorough com- 
parison of all the characters I am convinced that it belongs to the same * 
species. That specimen was broken into three unequal pieces, but 
mended with glue before sending. A small flake or cap, numbered 
500.25, from the light weathered surface of some trunk, having a 
coarse black structure on the fractured side, resembles No. 500.24 
more than any other specimen, but does not exactly fit its broken sum- 
mit. Rather than leave it wholly unassigned I assume that it belongs 
here. 
No. 500.1 weighs 12.56, No. 500.24, 2.52, and No. 500.25, 0.11 kilo; 
grams. 
