THE MARYLAND CYCADS. 469 



worn and the leaf scars and reproductive axes are distinctly shown. The 

 former are arranged in irregular quincunx order, and spiral rows ascend 

 from left to right at an angle of about 35° from the horizontal. One of 

 these spirals, if it could be traced the entire distance, would nearly com- 

 plete a circuit of the trunk in passing from base to summit. (Locality: 

 PI. LXXX, No. 59.) 



PL CII, Fig. 1 is an excellent side view of the Dennis Butler trunk, 

 W. C, B., No. 1462. It is a medium-sized trunk with a very eccentric 

 axis, lacking the armor on the thin side, nearly complete at the base, 

 truncated at the summit, with a large piece missing from one side, other- 

 wise entire. Its maximum height is 36 cm., and the longer diameter 

 of a cross section would be 30 cm. The shorter diameter is 16 cm., but 

 it was probably 18 cm. The girth is 74 cm. The surface has been 

 much worn, most on the otherwise defective side. The trunk is of a 

 light-brown color, thoroughly silicified, portions of the internal parts 

 being covered with fine quartz crystals or druse. (Locality : PL LXXX, 

 No. 52a.) 



PL CII, Fig. 2 shows the Tubbs trunk, W. C, B., No. 1465, at its 

 best. This is a large, fine trunk, somewhat elliptical in cross section, 

 nearly complete at the naturally hollow base, deeply concave at the 

 summit, where an unknown portion is wanting. It is of a dark color, 

 "well silicified, and in an excellent state of preservation. The maximum 

 height is 32 cm., but measured on the short side it is 28 cm., and at the 

 lowest place 26 cm. The girth is 95 cm. The long diameter at the base 

 is 34 cm., and the short one 25 cm. At the summit the diameters of 

 the cross section are, respectively, 33 cm. and 21 cm. (Locality: PL 

 LXXX, No. 46.) 



PL cm shows, natural size, the internal structure of the Smith 

 fragment, W. C, B., No. 1483, as brought out on the polished surface 

 of a longitudinal radial section. It extends through the thick armor, 

 the cortical parenchyma, and the fibrous zone into the medulla, and the 

 course of the vascular bundles can be clearly traced. This specimen is 

 also described on page 868. (Locality: PL LXXX, No. 59a.) 



PL CIV is a view of the side of the Gray trunk, W. C, B., No. 6354, 

 from a photograph made by the Woman's College. 



This is the upper part, probably more than half, of a fine trunk 

 which looks as though it might be the complement of W. C, B., No. 1464, 



