196 MESOZOIC FLORAS OF TNITED STATES. 



pression and distortion, hiil tlu' characters, so far as visiblo, are those of 

 C. crepidaria. It weighs 6.13 kg. 



Xo. 100.203 is another practically complete specimen that must be 

 referred to this species. It is subconical in shape, much flattened laterally, 

 and tapers from base to summit. There are no fractures and the surface 

 characters are well shown. Even the terminal bud is present and shows 

 tlic summits of the small quadrangular leaf scars. The base is also per- 

 fect, and here the axis is clearly separated from the armor all round. 

 The two flat sides are unlike, showing that the trunk stood in an inclined 

 position. It is 12 cm. high and the diameters of the elliptical base are 9 

 cm. and 16 cm., respectively, giving a girth of 39 cm. The armor varies 

 in thickness from 5 mm. on one side to 5 cm. at the ends of the elliptical 

 base. The axis also shows an elliptical cross section 5 cm. by 10 cm. in 

 diameter. The trunk weighs 1.3 kg. 



No. 100.226 is a somewhat larger and less perfect trunk, but conforms 

 more nearly to the type. It is flat like that, but the base is not well shown. 

 Most of one of the flat sides is wanting and the mold of the medulla extends 

 from the base to near the summit in the form of a hollow trough. The other 

 side is perfectly preserved. It is 16 cm. high and had a major diameter 

 of 14 cm. The specimen weighs 1.67 kg. 



Nos. 500.512 and 500.111, the latter quite small, exactly supplement 

 each other to form another smaller l)ut complete trunk. It approaches 

 the t_vpe more closely than either of the last two specimens described, in 

 that the axis passes through the middle, transverse to the direction of 

 greatest extension, but differs in the fact that the flattening is lateral 

 instead of vertical when referred to the axis. Its \ery irregular form can 

 be Best seen from the figures. Its height in the direction of the axis is 11 

 cm., and the diameters are I'espectively 9 cm. and 20 cm. The latter may 

 be called the length. The girth is 45 cm. It weighs 1 .91 kg. The surface 

 is black and rough, showing the scars imperfectly. The fracture between 

 the two specimens shows that the interior is also black and the structure 

 obscure. 



Five other small fragments have been referred to this species witli 

 more or less confidence. 



PI. LVni is a \'iew of the liest side of the trunk consisting of Nos. 

 100.202, 100.215, and 100.230. PI. LIX shows the best preserved side of 

 No. 100.203. PI. LX is a view of the convex side of the trunk Xo. 100.220. 



