112 -MKSOZUIC FLOIJAS OF LMTED STATES. 



i-'oDo/.AMiTK.s i.AXCEOLATU.s LATiFoi. US ( Fiii'diicli lirauii) Heer." 



PI. XXV, Figs. 5-7. 



1<S40. Zairiitts- latifdlius Vv. Br. ikiu (Bruiign.i l^real ; Vfizeicliu. d. Kreis-Nat.- 



Siiiiiml. z. Bayrcuth, p. 100 (nomen). 

 1S47. Zaiiiites disiaris Idtlfolid Fr. Br.: Flora, Vol. XXX, p. 85 (nomen). 

 1S67. Zaiiiites distans latifolla Fr. Br. Sclienk; Foss. Fl. d. Grenzsch.. p. 102, pi. 



xxxvi, fig. 10. 

 1870. Podozamites distans latifolius (Fr. Br.) Schinip.: Pal. Veg., Vol. II, p. 159. 

 1S76. Podozamites lancenlatus Jatifolius (Fr. Br.) Ileer; Fl. Foss. Aix't., Vol. IV, 

 Pt. II (Jura-Fl. Ostsihiriens), p. 10(1, jjI. xxvi, figs. 5, 6, 81), 8c. 



Three specimens of broad leaflets, not attached, that agree very 

 well with Heer's variety latifolius'' were oljtained, two from locality 

 Xo. 19, and one from locality Xo. 7. The leaf texture seems to have 

 been quite thick, so that the nerves are not visible. 



PI. XXV, Fig. 5, shows a nearly entire leaflet of medium size, of 

 which Fig. 6 is an enlargement. Fig. 7 gives two leaflets, one of the 

 largest and one of the smallest size. 



Podozamites ( pachyxervls Fontaine n. sp. 



PI. XXV, Fig. s. 



t 



Fig. 8 gives a problematic form that may be a Zamites. It 

 occurs at locality No. 2 in the form of a fragment of a leaflet, with the 

 base and apex not preserved. As it nari'ows toward the base after the 

 fashion of Podozamites it may be placed provisional!}' in that genus. 

 The single specimen found does not suffice to fix its character. It is 

 noteworthy for the very strong nerves that stand out on the surface 

 like threads. They are about 10 in number, and diverge on entering 

 the wider portion of the leaflet near the base, and then become parallel. 

 They are unbranched. 



" I was pi(i[)iilily in orror in the firet paper (p. .36) in includins the Tieniopierin hitifolia of Brongniart from 

 tile Oolite of Stom'sfield, England, in the synonymy of this species. Sternberg first referred it to Odontopteris, 

 and Pre.sl to Zamites, as there stated; but no one seems to have followed Presl in this, and Brougniarl in his 

 Tableau (1849) adhere.s to his original determination and has been generally followed. There is no evidence 

 that Friedricli Bru'in had Brongniart's plant in mind in naming his Zamites htifotiH.i (1840), which he made a 

 variety of Z. distans in 1847, the name adopted by Schenk when he reelaborated the Rhetic material in 1870. 

 Heer referred all the fomis of Z. distans that he found in the Oolite of Siberia to Podozamites lanceoUtliis {Zamia 

 laneeolata L. & H.), using Schenk's varietal names in some cases, but not consistently. — L. F. W. 



fcFl. Foss. Arct., Vol. IV, Pt. II, p. 109, pi, .xxvi, figs. 5, 6, 8b, c. 



