204 MESOZOIC FLORAS OF UNITED STATES. 



and this might locate it in the Lakota formation some distance north 

 of Cambria and in the general region of the Newcastle coal field."" 



Mr. George R. Wieland, who has taken a deep interest in all matters 

 relating to fossil cycads, whose internal structure he is so successfully 

 working out, spent a good part of the field season of 1900 in the Black 

 Hills making collections for the American Museum of Natural History. 

 He paid special attention to questions of sti-atigraphj-, and made many 

 valuable sections, which, through the kindness of Prof. H. F. Osborn, 

 I have the permission to use in this paper, together with other informa- 

 tion which Mr. Wieland, at my request, has contributed. He studied 

 the Jurassic and Lower Cretaceous beds of the Black Hills on nearly 

 all sides, but especially on the northeast and southwest sides. In the 

 course of his investigation of the Jurassic beds northwest of Cambria 

 he discovered fragments of cycads in the Beulah clays, occupying a 

 stratigraphical position similar to or identical with that of the cycad 

 bed of the Freezeout Hills in Carbon County. This locahty is between 

 50 and 60 miles northwest of Hot Springs, and therefore corresponds, 

 in distance, at least, to the source of the Cycadeoidea utopiensis. He 

 says that the specimens obtained there b}^ him resemble that .speci- 

 men. He has also carefully examined the patch of ramentum on that 

 specimen described by me and has no doubt that it belongs to the genus 

 Cycadella. There is scarcely any doubt that all this is true, that he 

 has virtually found the locality, and that the specimen really came 

 from Jurassic beds. The species is therefore transferred to that genus 

 and will henceforth bear the name Cycadella utopiensis (Ward) Wieland. 

 It is figured in this paper on PI. LXIII, Fig. 2. 



Mr. Wieland has furnished the following notes and sections relating 

 to the geotogj^ and paleontology^ of the southwest side of the Black 

 Hills in Crook County, Wyo., which are of special interest in this 

 comiection : 



"Elaboration of the fossil cycads in the Yale Museum: Am. Jour. Sci., 4th ser., Vol. X, November, 1900, 

 pp. 327-34.5, pis. ii-iv. Cycadeoidea utopiensis is described on pp. 338-340 and figured on pi. iii, upper figure 

 (No. 727 of the Yale Museum). 



