knowlton.] TERTIARY PLANTS OF NORTH AMERICA. 245 
Zamites distantinervis Font. Potomac Fl.,,p. 172, pi. Ixxxiii, f. 4, 
1889. 
Potomac formation : Fredericksburg, Virginia. 
Zamites montana l)n. Trans. Boy. Soc. Canada, vol. iii, sec. iv, p. 7, 
pi. i, f. 6, 6a, 1885 [1886]. 
Kootanie: Martin Creek, Kootanie Pass, and Anthracite, British 
Columbia. 
Zamites montanensis Font. Proc. IT. S. Nat. Mus., vol. xv, p. 494, 
pi. Ixxxiv, f. 4, 1892. 
Kootanie: Great Falls, Montana. 
Zamites ovalis Font. Potomac Fl., p. 173, pi. lxxxv, f. 4; clxx, f. 3, 
1889. 
Potomac formation: Dutch Gap Canal, near Potomac Pun, and 
near Telegraph Station, Virginia. 
Zamites subfalcatus Font, Potomac Fl.. p. 173, pi. Ixxxiv, f. 13; 
lxxxv, f. 3, 1889. 
Potomac formation : Kankeys, Virginia. 
Zamites tenuinervis Font. Potomac Fl., p. 171, pi. Ixvii, f. 1 ; pi. 
lxix, f. 2; lxx, f. 1; lxxv, f. 3; lxxvi, f. 7; lxxviii, f. 6; Ixxxiv, f. 7, 
1889. 
Potomac formation: Fredericksburg, Kankeys, Dutch Gap Canal, 
and near Telegraph Station, Virginia. 
Trinity division : Glenrose, Texas. 
Zamites sp., Dn. Trans. Roy. Soc. Canada, vol. iii, sec. iv, p. 7, pi. i, 
f. 4, 1885 [1886]. 
Kootanie : Kootanie Pass. 
Zamites sp., Font. Potomac Fl., p. 173, pi. Ixxxiv, f. 12, 1889. 
Potomac formation : Kankeys, Virginia. 
Zamites sp., Lx. Fl. Dak. Gr., p. 26, pi. i, f. 8, 1892. 
Dakota group : Kansas. 
Zanthoxylon Walt., Fl. Carol., p. 52, 243, 1878 = Zanthoxylum L. 
ZANTHOXYLUM Linnaeus. Hort. Cliff., p. 487, 1737. 
Zanthoxylum diversifolium Lx. Mem. Mus. Comp. Zool., vol. vi, no. 
2, p. 33, pi. viii, f. 14, 15, 1878. 
Miocene: California. 
Zanthoxylum dubium Lx. Ann. Kept. IT. S. Geol. and Geogr. Surv. 
Terr. 1871, suppl., p. 15, 1871 [1872]. [Not afterwards mentioned by 
author.] 
Laramie group?: Fischers Peak, New Mexico. 
Zanthoxylum spireaefolium Lx. Cret. and Tert. FL, p. 196, pi. xl, f. 
1-3, 1883. 
Green Eiver group : Florissant, Colorado. 
