430 MESOZOIC FLORAS OF UNITED STATES. 



PL LXXXIX, Fig. II, 4, shows most of one side of the R. T. Don- 

 aldson fragment, No. 14, M. G. S.-W. C, B., No. 9058, a small specimen, 

 so covered with coarse sand firmly cemented to it that scarcely any- 

 thing can be seen. It shows the external surface on one side and the 

 medulla on the other, with two radial fractures through which the 

 strands can be seen to pass. There are also two transverse fractures, 

 on the upper one of which the division into armor, wood, and pith can 

 be seen. The rock is hard and heavy. (Locality: PI. LXXX, No. 106.) 



PI. LXXXIX, Fig. II, 7, shows considerable of the outer surface 

 of the R. P. Disney fragment, No. 6, W. C, B., No. 6359, a good-sized, 

 deeply pink-stained fragment, very poorly preserved, having a mashed 

 mudlike appearance, but showing some very much distorted and exag- 

 gerated scars on the rounded surface. The inside is concave and shows 

 distorted medullary rays. It is 24 cm. long (vertically), 15 cm. wide 

 (tangentially), and 10 cm. thick (radially). (Locality: PL LXXX, 

 No. 60.) 



PL LXXXIX, Fig. Ill, 2, is a view of the broader side of the R. P. 

 Disney fragment. No. 5, W. C, B., No. 6358, an almost shapeless frag- 

 ment, showing just enough to make sure that it is a cycad. There is 

 considerable surface, but no scars can be distinguished, the leaf bases 

 and walls being all irregularly and unevenly broken and massed into 

 a rough, harsh surface without structure. The inside is almost as obscure, 

 and it is not certain what zone it represents. It may come from near 

 the summit of a trunk. The measurements are 15 cm., 12 cm., and 10 

 cm., the last being from without inward. (Locality: PL LXXX, near 

 No. 50.) 



PL LXXXIX, Fig. Ill, 5, shows a little of one of the fracture planes 

 of the R. T. Donaldson fragment, No. 17, M. G. S.-W. C, B., No. 9065, 

 a small orange-stained fragment showing scarcely any structure, being 

 mostly bounded by fracture surfaces. Over one small area a few much- 

 worn scars are visible. It extends to the inner wall of the woody zone, 

 where faint markings occur on the concave siu'face. The fractures 

 show no structure. It is 12 cm. long, 10 cm. wide, and 7 cm. thick. 

 (Locality: PL LXXX, No. 106.) 



PL LXXXIX, Fig, in, 8, is a clear view of the outer side of the 

 R. T. Donaldson fragment, No. 8, M. G. S.-W. C, B., No. 8319, which 



