446 MESOZOIC FLORAS OF UNITED STATES. 



The specimen is much ligliter colored than most of those from 

 the iron-ore beds. It is thoroughly silicified and moderately hard and 

 heavy. It is 15 cm. long (high) and 5 cm. in radial direction. (Local- 

 ity: PL LXXX, No. 106.) 



PL LXXXVII, Fig. V, 21, represents the R. T. Donaldson frag- 

 ment, No. 1, W. C, B., No. 1473. This is a small fragment of what 

 may properly be called bark — that is, liber and armor. It is 16 cm. 

 long, 65 mm. wide, and 4 cm. thick, and triangular in shape. The 

 markings on the inner surface are distinct and consist of elevated and 

 somewhat rhombic scars terminating in a prolonged ridge tapering to 

 a point. (Locality: PL LXXX, near No. 106.) 



PL LXXXIX, Fig. I, 1, shows the Whitehead trunk, No. 2, M. G. S.- 

 W. C, B., No. 9051, lying on its side and exhibiting the exposed medulla 

 and adherent armor, the base being at the right. It embraces con- 

 siderable of the lower part of a fair-sized trunk of doubtful affinity, 

 somewhat resembhng W. C, B., No. 1488, but harder and heavier. One 

 side is eroded or decayed to the medulla, and both the base and sum- 

 mit are wanting, but the former could not have been far away. It is 

 23 cm. high, oblique in the same direction below and above, 23 cm. in 

 larger and 15 cm. in smaller diameter, this latter not complete. It has 

 a girth of 64 cm. (Locality: PL LXXX, near No. 105.) 



PL LXXXIX, Fig. Ill, 1, is a view of the R. T. Donaldson frag- 

 ment, No. 10, M. G. S.-W. C, B., No. 9053. It is 10 cm. long, 8 cm. 

 wide, and 5 cm. thick, and shows a few scars and reproductive organs. 

 (Locality: PL LXXX, No. 106.) 



PL LXXXIX, Fig. Ill, 3, is a surface view of the Marlowe frag- 

 ment. No.. 3, M. G. S.-W. C, B., No. 9061. It has an area of surface 

 6 cm. by 10 cm., showing scars of leaves and fruits, and extends 6 cm. 

 inward to the woody zone. (Locality: PL LXXX, No. 100.) 



PL LXXXIX, Fig. Ill, 6 shows faintly, because somewhat out of 

 focus, the side of the R. T. Donaldson fragment, No. 15, M. G. S.-W. C, 

 B., No. 9062. It consists of a small piece, chiefly of armor, 11 cm. high, 

 12 cm. wide, and 4 cm. thick, and having the same kind of matted and 

 obscured surface as W. C, B., No. 3347, which it also resembles in other 

 respects. (Locality: PL LXXX, No. 106.) 



PL LXXXIX, Fig. Ill, 7 represents the R. T. Donaldson fragment, 

 No. 16, M. G. S.-W. C, B., No. 9064, a pecuUar spongy-looking fragment, 



