274 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



979. Ptenostrobus nebrascensis Lesquereux. Type. 



Dakota (Cret.). Bluffs of the Missouri River, eight miles 

 northeast of Winnebago Village, Nebraska. 



Lesquereux, Rept. U. S. Geol. Surv. Terr., VI, Pt. I, 1874, p. 114, 

 pi. 24, fig. 1. 



50078. Pteris dakotensis Lesquereux. Types. 



50079. Dakota (Cret.). Cloud County, ten miles northeast of 



Delphos, Kansas. 

 Lesquereux, Mon. XVII, U. S. Geol. Surv., 1891, p. 24, pi. 1, figs. 2, 3. 



23. Pteris erosa Lesquereux. Illustrated specimen. 



Denver? (Cret.). Golden, Colorado. 



Lesquereux, Rept. U. S. Geol. Surv. Terr., VII, Pt. II, 1878, p. 53, 

 pi. 4, fig. 8. 



= Asplenium erosum. 



17. Pteris gardneri Lesquereux. Type. 



Arapahoe (Cret.). Sand Creek, Colorado. 



Lesquereux, Ann. Rept. U. S. Geol. Surv. Terr., 1873 [1874], p. 393. 

 = Gymnogramma gardneri. 



589. Pteris nebraskana ? Heer. Illustrated specimen. 



Dakota (Cret.). Fort Harker, Kansas. 



Lesquereux, Rept. U. S. Geol. Surv. Terr., VI, Pt. I, 1874, p. 46, 

 pi. 29, fig. 5. 



7098. Pteris pennaeformis Heer. Illustrated specimen. 



Eocene? (Tert.). Currant Creek, Oregon. 



Newberry, Mon. XXXV, U. S. Geol. Surv., 1898, p. 7, pi. 48, fig. 5. 



18. Pteris pseudopennaeformis Lesquereux. 



Illustrated specimen. 

 Denver (Cret.). Henrys Forks, Wyoming. 



Lesquereux, Rept. U. S. Geol. Surv. Terr., VII, Pt. II, 1878, p. 52, 

 pl. 4, fig- 3- 



6962. Pteris russelli Newberry. Type. 



Laramie (Cret.). Vermejo Canyon, Colfax Count} 7 , New 

 Mexico. 



Newberrv, Proc. U. S. Nat. Mus., V, 1883, p. 503; Mon. XXXV, 

 U. S. Geol. Surv., 1898, p. 7, pl. 61, fig. 1. 



20 Pteris subsimplex Lesquereux. Illustrated specimens, 



to Denver (Cret.). Golden, Colorado. 



22 - Lesquereux, Rept. U. S. Geol. Surv. Terr., VII, Pt. II, 1878, p. 52, 



pl. 4, figs. 5, 6, ■/. 



=Asplenium subsimplex. 



476. Pterocarya americana Lesquereux. Type. 



Green River (Tert.). Middle Park? Florissant, Colorado. 



Lesquereux, Ann. Rept. U. S. Geol. and Geogr. Surv. Terr., 1873, 

 I 1874], p. 417 ; Rept. U. S. Geol. Surv-. Terr., VII, Pt. II, 1878, 

 p. 290, pl. 58, fig. 3. 



