JURASSIC CYCADS FROM WYOMING. 193 



It was greatly compressed vertically, so that the axis is only about 12 cm. 

 long, while the bulk of the material of the trunk lies in a plane perpendicular 

 to the axis. The trunk is also compressed laterally, so that the smaller 

 diameter is only 15 cm. In the direction of the longer diameter much is 

 still wanting on each side. What is left measures 12 cm. The new speci- 

 men weighs 1.53 kg. and extends the original specimen 8 cm. The next 

 most important specimen is No. 100.218, which represents more than half 

 of a laterally compressed trunk and weighs 1.26 kg. It is smoothly 

 broken across both ends, which seem to be the base and summit, but the 

 axis is obscurely shown and the fractures may be somewhat oblique. It 

 shows the external surface well on both the broader sides. 



No. 100.241 is a portion of a trunk of pecuhar shape, and the whole of 

 one side is occupied by the medulla, which has a twisted appearance and 

 shows some protuberances. The specimen is smoothly broken across the 

 top and shows the thick armor and thin wood, covered with the coating of 

 ramentum. Near the base this latter has disappeared and the shape of 

 the leaf scars is shown better than in any other specimen of this species. 



PL LVI, Fig. 1, shows the best side of the trunk No. 100.218; PI. LVI, 

 Fig. 2, shows the outer surface of the trunk No. 100.241, and Fig. 3 the 

 inside on which the meduUa is exposed. 



Cycadella gravis Ward. 



1900. Cycadella gravis Ward: Proc. Wash. Acad. Sci., Vol. 1, p. 277; Twentieth 

 Ann. Rep. U. S. Geol. Surv., 1898-99, Ft. II, p. 410, pi. cliv. 

 Only two imperfect fragments were found in the later collections that 

 could be referred even with doubt to this species. These are Nos. 500.194 

 and 100.242. These most resemble the only type specimen, No. 500.63, 

 and suggest that they may be specifically identical with it, but this is all 

 that can be said of them. 



Cycadella verrucosa Ward. 



1900. Cycadella verrucosa Ward: Proc. Wash. Acad. Sci., Vol. I, p. 278; Twentieth 

 Ann. Rep. U. S. Geol Surv., 1898-99, Pt. II, p. 410, pi. clv-clvii. 



A single small specimen only. No. 500.505, is referred to this species, 

 and this with grave doubt. It may represent a terminal bud, or it may 

 only be a large branch. The surface markings point to this species and 

 differ from those of any other. 



MON XLVIII — 05 13 



