428 MESOZOIC FLORAS OF UNITED STATES. 



sandj^, and light in weight relatively to its size. It is nearly square, 

 three of the sides straight, the fourth iDroadly triangular. The straight 

 sides measure, respectively, 80 mm., 85 mm., and 90 mm., and the 

 length to the point of the triangle is 105 mm. The average thickness 

 is about 4 cm. (Locality: PI. LXXX, No. 74.) 



PL LXXXVII, Fig. V, 3, is a view of the side and top of the R. T. 

 Donaldson fragment. No. 2, W. C, B., No. 1656. It is a small frag- 

 ment of a yellowish-brown color, 16 cm.- long and 9 cm. wide by 8 cm. 

 thick, from the interior of a trunk, showing on one edge a little of the 

 medulla and wood, poorly preserved, and on the other some perfora- 

 tions and irregularities that evidently came from the surface but afford 

 no idea of the shape of the leaf scars or nature of the buds. The holes 

 may belong to the latter, being round, and at the bottom of some of 

 them there is a partition dividing them into two. (Localit}': PL LXXX, 

 near No. 106.) 



PL LXXXVII, Fig. V, 5, shows the Owens fragment, W. C, B., 

 No. 3057, which is a small piece from the greatl}^ compressed edge of 

 a trunk, and consists almost entirely of the armor. It is of a light- 

 brown color and rather soft, sand}^ consistency. It is 13 cm. long in a 

 tangential direction and 5 cm. thick at the summit, but wedge shaped, 

 so as to be only 3 cm. across the inner edge. The width is 9 cm., one 

 face representing the exterior and the other a broken side parallel to 

 the leaf bases. The scars are reduced b}^ pressure and distortion to 

 mere slits or angular perforations and can not be described or measured. 

 (Locality: PL LXXX, No. 82.) 



PL LXXXVII, Fig. v,'6, is a view of the R. P. Disne.y fragment, 

 No. 3, W. C, B., No. 6350, one of the least important specimens, showing 

 scarcely any structure. The exterior consists of a matted mass of dis- 

 torted organs unevenly broken to form a harsh rough surface. One 

 seems to be a large fruiting organ. It extends some distance inter- 

 nally, but the different zones do not show on the fractures which bound 

 three sides. The dimensions are: Length, 11 cm.; width, 8 cm.; thick- 

 ness, 8 cm. (Locality: PL LXXX, near No. 50.) 



PL LXXXVII, Fig. V, 7, represents the R. T. Donaldson fragment, 

 No. 7, W. C, B., No. 6349, which consists of a small piece of a vertically 

 compressed trunk, perhaps coming from near the base, showing the 



