THE MARYLAND CYCADS. 431 



is a small fragment, showing some poorly preserved scars on one side 

 and the distinct striations of the medullary rays on the inner wall of 

 the concave woody zone on the other. It has a transverse and a radial 

 fracture. It is 13 cm. long, 8 cm. wide, and 6 cm. thick. (Locality: 

 PL LXXX, No. 106.) 



PI. XC is from an excellent platinum print, made by Mr. T. W. 

 Smillie, photographer of the National Museum, of the best preserved 

 side of the Link trunk, W. C, B., No. 1481, and is by far the finest illus- 

 tration we have of that important specimen. 



The Link trunk consists of the upper poi-tion, or perhaps nearly 

 the whole, of a medium sized trunk considerably compressed laterally. 

 There are some indications that the somewhat even cross section seen 

 from below may have been near the true base. The summit is not 

 depressed, neither is there a conical leaf bud, and the contour is nearly 

 regular. Seen from the side the trunk presents a nearly semicircular 

 outline. Viewed in the direction of its longer diameter it is somewhat 

 conical, but there are depressions of different depths on both sides. The 

 color is a light brown, drab, or fawn, the substance is soft and friable, 

 and the specific gravity is low. The maximum height in an erect posi- 

 tion is 25 cm., the major axis measured across the lower end is 39 cm., 

 and the minor 22 cm. The compression, however, is least at this point, 

 and the minimum would not exceed 12 cm., which is slightly increased 

 just below the summit. The girth at the base is 97 cm., while at about 

 the middle part it is 86 cm. (Locality: PI. LXXX, No. 62a.) 



PL XCI is a view from another of Mr. Smillie's platinum prints of 

 one of the broad sides of the type specimen called the Helwig trunk, 

 W. C, B., No. 3328. This is a nearly perfect trunk, which before com- 

 pression was probably a true cone rounded off at the apex. The exterior 

 is generally well preserved, but on one side all the partitions have been 

 broken or worn off to the depth of 1 cm. or more, and the lower portion 

 of the other side is still more deeply worn, so as to give a somewhat even 

 surface flush with the remains of the leaf bases. The trunk is of a lively 

 pinkish red color, rather soft and sandy in its composition, and of medium 

 specific gravity. 



The trunk stands 33 cm. high. The long diameter at the base is 31 

 cm. and this diminishes gradually to 23 cm. just below the abrupt contrac- 



