460 MESOZOIC FLORAS OF UNITED STATES. 



the shorter side to 17 cm. The greatest witlth measured across tlie 

 broken side is nearly 18 cm., but the radial fracture makes a triangular 

 projection near the lower end and the width above this is only 14 cm. 

 The greatest thickness of the slab is 6 cm. 



PL LXXXVII, Fig. I, 2 gives a view of one of the narrow sides of 

 the Tubbs trunk, W. C. B.. Xo. 1465. 



PI. LXXXVII, Fig. I. 4 is an excellent view of the Polly Jones 

 trunk, W. C, B., No. 1427, standing on its base. As the principal type 

 of the species, it here compares well with those of C. Goucheriana and 

 C. Tysoniana, between which it stands. 



PI. LXXXVII, Fig. I, 6 shows the Weston trunk, W. C, B., No. 

 1468, but the terminal Imd does not come out into relief as well as in 

 the other figures. 



With the exception of the worn condition of the exterior, this is one 

 of the most perfect specimens in the collection. It is a whole trunk, from 

 base to summit, including the terminal l)ud. It has evidently long stood 

 on its base, perhaps under the dripping eaves of a house, and all definite 

 markings have disappeared from the apex. The terminal i)ud is sui- 

 rounded by a sUght moat-like depression. A small piece has been 

 ijroken from its extreme apex. For want of fractures anywhere, only 

 surface characters can be seen. The trunk is much compressed laterally 

 and has large concave depressions on its sides, so as to be thinnest in its 

 central portions. Before compression it doubtless was nearly conical, 

 but narrowed a little toward the Ijase, especially on one side. It is of a 

 light-brown color, lighter in some parts than in others, of a rough sandy 

 consistency, but well silicified, and of medium specific gravity. It 

 stands 37 cm. high. The long diameter is 34 cm. and the short one about 

 14 cm., but quite variable at different points. The average girth is 88 cm. 



The best view of this trunk that has been published is that on PI. Ix, 

 fig. 9, of the Nineteenth Annual Report of the United States Oeological 

 Survey, Pt. II, published in 1899, which shows the best preserved side 

 and the terminal l)ud in fine relief. 



PI. LXXXVII, Fig. I, 7 presents one of the thinner edges or sides 

 of the Dennis Butler trunk, W. C, B., No. 1462, better shown elsewhere. 



PI. LXXXVII, Fig. II, 1 is the only view offered of the Robinson 

 trunk, W. C, B., No. 1487, standing on its edge in such a manner that to 



