THE MARYLAND CYCADS. 467 



specimen. The compression was greatest in the middle, so that the inner 

 edge is thinner than the outer. The lower end may represent the true base. 

 It consists almost entirely of armor, the axis having mainly disappeared 

 before compression. It extends more than halfway around. It is oblique 

 at the base and also at the summit in such a manner as to make the two 

 cross sections parallel. There is a kind of groove or hollow trough on the 

 inner edge, but one side of the armor projects farther in that direction than 

 the other. It is of a light-brown color, darker where freshly broken, 

 rather hard and firm, but not heavy. Its maximum length from point to 

 point is 27 cm., but measured along either edge it is only 19 cm. The 

 wider side is 13 cm. and the narrower 10 cm. The greatest thickness is 

 less than 8 cm., while at the inner edge it is not over 5 cm. The surface is 

 covered with the organs of the armor, which on one side are completely 

 appressed to the rock and merely point outward or toward the edge of the 

 specimen. On the other, which is the broader, side they are fairly well 

 preserved, seem to stand at right angles to the trunk, and were probably 

 arranged in spiral rows, but these can not now be traced. (Locality: 

 PL LXXX, No. 102.) 



PL LXXXIX, Fig. I, 5 shows one side of the Travers trunk, W. C, B., 

 No. 6356. 



This is a small, nearly complete, probably immature trunk of com- 

 pressed cylindrical shape, much worn over the whole surface, so as to 

 show none of the leaf scars to advantage, the erosion penetrating the 

 inner wood and even to the medulla on one side. The base is hollowed 

 out to a depth of 6 cm. The summit is entire, but from one side of it 

 a piece 8 cm. long is broken out, exposing the upper end of the axis con- 

 verging to the terminal bud, which is not present. The trunk stands 

 30 cm. high, is 17 cm. in greater and 9 cm. in lesser diameter, slightly 

 contracted at base and summit. The maximum girth around the middle 

 is 42 cm. (Locality: PL LXXX, No. 69.) 



PL LXXXIX, Fig. II, 2 represents the Marlowe fragment. No. 2, 

 M. G. S.-W. C, B., No. 9059, which is a piece out of one side of a moderate- 

 sized trunk, and has a maximum length of 13 cm. It includes only the 

 armor and wood and is concave on the inner side, showing obscure mark- 

 ings of the medullary rays. The radial thickness is 9 cm. and the tangen- 

 tial length 22 cm. (Locality: PL LXXX, No. 100.) 



