408 MESOZOIC FLORAS OF UNITED STATES. 



Uhler kindly consontoil to luive the four specimens that he luul obtained 

 at various times, and which were in the museum of the Marvhmd Academy 

 of Sciences, inchided in my report on the cycads of Marylaiul, and he 

 invited me to come to the academy and describe them. This I did in 

 January, 1895, at which time I also described the two trunks and two 

 fragments that wei'e then in the geological museum of Johns Hopkins 

 University (see p. 482). I then supposed that these two fragments were 

 the same that Professor Fontaine had described. 



On this occasion, at Professor Uhler's invitation, I delivered at the 

 Peabody Institute two lectures on the "Vegetation of the Ancient World."" 



Many additional trunks and fragments obtained by Mr. Bil)])ins in 

 1895 were sent me in the fall of that year, which I worked up during the 

 winter. They continued to come during the whole of 1896, and in 

 Febi-uary, 1897, I was ready to prepare descriptions of the species. Of 

 these I was then able to distinguish 7 as the result of a somewhat careful 

 study of all the Maryland cycads '' known to me at that date. This 

 paper was not illustrated, and the figures given in the group represented 

 in my paper in the Sixteenth Annual Report of the United States (leolog- 

 ical Survey ' could not then be named. In my later paper on the Black 

 Hills, in which the numerous cycads from that region were systematically 

 dealt with, I introduced a group of Maryland cycads'' for comparison 

 and appended the names of the species. This group contains 6 of the 

 7 species. The one species not figured there is Cycmleoidea Tyson iana, 

 which was included in the group on pi. c of the vSixteenth Annual Report, 

 Ijeing fig. 2 of that plate. They are, however, all described and figured 

 in the present paper, as well as the two additional species that have been 

 discovered since that time. 



The entire collection of Maryland cycads loaned by the Woman's 

 College was returned on December 14, 1897. 



As the history of Mr. Tyson's early discoveries of cycads in Maiy- 

 land has never been written, I insert the following extracts from letters 



« Soe note in Science, n. s., Vol. 1, Fel). 1, 189.5, p. 138. 



'' Descriptions of the species of (Vciideoidea, or fossil cycadean trunks, tlius far discovered in the iron-ore 

 Ix-lt, Potomac formation, of Marvhiiid, hy Ij<'ster F. Ward: Proc. Biol. Soc. Washington, Vol. XI, March 13, 

 1897, pp. 1-17. 



<^ Part I, pi. c following p.-lSti. 



dNimteenth Ann. Rep. U. .S. Geol. Surv., Pt. II, 1899, pi. Ix 



