406 OLDER MESOZOIC FLORAS OF UNITED STATES. 
surface generally, and Fig. 2 the tranverse fracture. Pl. CK XXIV 
gives a side view of No. 500.37, Pl. CKXXV, Fig 1, a view of its 
base, and Fig. 2 the transverse fracture. Pl. CXXXVI, Fig. 1, 
shows the almost wholly concealed outer surface of the combination 
Nos. 500.44 (6) and 500.78 (a), and Fig. 2 the transverse section at top 
of No. 500.44. Pl. CX X XVII gives the eee fractures of the 
same two fragments. 
CyYcaDELLA -RAMENTOSA Ward. 
Pl. LXX, Figs. 4, 5; Pls. COV IL CEUEN 
1900. Cycadella ramentosa Ward: Proc. Wash. dont, Sci., Vol. I, p. 275. 
Trunks rather large (15 to 25 cm. high, 2 to 25 cm. in diameter), 
cylindrical or subellipsoidal, somewhat compressed laterally or verti- 
cally, mostly unbranched; rock hard and much mineralized within, 
dark brown on the surface, the fractured surfaces variegated with black 
and white, more or less flinty or chalcedonized; specific gravity above 
the mean; organs of the armor horizontal or radiating from an equa- 
torial zone; leaf scars subelliptical, 10 to 15 mm. wide, 6 to 9 mm. 
high, hard, dark, rough, punctate with white, tubular pores; walls 
1 to 83 mm. thick, firm and smooth, light colored or yellowish, sunk 
below the leaf bases, with a median line or groove; reproductive organs 
few, mostly concealed by the ramentum coating, where exposed well 
developed, raised above the leaf bases, mostly elliptical and 15 by 20 
mm. in diameter, inclosed in an involucre of narrowly rhombic bracts 
visible in transverse and longitudinal section, central portions well 
shown on fractured surfaces, the interior mostly decayed and some- 
what crystallized; armor 4 to 6 cm. thick, attached to the axis by an 
irregular, somewhat scalloped surface; wood 3 cm. thick, undifferen- 
tiated; medulla elliptical in cross section, 3 by 5 cm. in diameter. 
This species includes ten numbers of Mr. Knight’s collection, but 
probably only represents three trunks, since five of these fragments 
(Nos. 500.40, 500.43, 500.45, 500.66, and 500.81) all fit together and 
may be built up into a single specimen representing nearly half of one 
trunk, and Nos. 500.50 and 500.60 also match, forming about one-third 
of another. Nos. 500.39 and 500.55 do not exactly match, but so closely 
resemble each other that the amount and character of the part lost can 
be determined with considerable certainty. They can not well belong 
to either of the other combinations. No. 500.39 is the next most 
important specimen in the collection in furnishing the generic char- 
acters, and slides illustrating them have been prepared from it. From 
these were obtained the cross sections of the chaff shown by Figs. 4 
and 5 of Pl. LXX. 
No 500.34 is a small apical portion of a trunk of the same type and 
may well have formed the top of No. 500.39 and the lost piece that 
