PROCEEDINQS 



OF THE 



WASHINGTON ACADEMY OF SCIENCES 



Vol. I, pp. 253-300. February 14, 1900. 



DESCRIPTION OF A NEW GENUS AND TWENTY 



NEW SPECIES OF FOSSIL CYCADEAN TRUNKS 



FROM THE JURASSIC OF WYOMING. 



By Lester F. Ward. 



contents. 



Discovery and history 253 



Stratigraphic position 254 



Personal field work 255 



Laboratory preparation 257 



Generic characters of fossil cycadean trunks 260 



The ne\r genus Cycadella 261 



Systematic description of the genus and species 263 



DISCOVERY AND HISTORY. 



A CONSIDERABLE number of fossil cycadean trunks have been 

 obtained from the Jurassic of Wyoming. The locality is in 

 what are called the Freezeout Hills of Carbon County, twenty- 

 five miles nearly due north of Medicine Bow. 



The history of the discovery of these fossil trunks only dates 

 back to 1898. The first intimation that I had of it was con- 

 tained in a telegram from Prof. O. C. Marsh, dated July 15, 

 1898, as follows : " Have two small cycads, apparently new, 

 from a new Wyoming locality ; will send them by express if 

 you can use them in your report." The 'report' alluded to is the 

 description of the Black Hills cycads in the Nineteenth Annual 

 Report of the U. S. Geological Survey (Pt. II, pp. 594-641, 

 pi. Ixi-clvii), which had gone to the printer before the telegram 

 was received. As the new locality is not in the Black Hills it 



Proc. Wash. Acad. Sci., February 1900. (253) 



