274 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



979. Ptenostrobus nebrascensis Lesqiiereux. 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. I. 



50078. Pteris dakotensis Lesquereux. Tj-pes. 



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



Delphos, Kansas. 



Lesquereux, Mon. XVII, U. S. Geol. Surv., 1S91, p. 24, pi. i, figs. 2, 3. 



23. Pteris erosa Le.squereux. Illustrated specimen. 



Denver? (Cret.). Golden, Colorado. 



Lesquereux, Rept. U. vS. 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 pen'naeformis Heer. Illustrated specimen. 



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



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



18. Pteris pseudopennaeformis Lesquereux. 



Illustrated .specimen. 

 Denver (Cret. J. Henrys Forks, \\'>oniing. 



Lesquereux, Rept. U. S. Geol. Surv. Terr., VII, Pt. II, 1S78, p. 52, 

 pi. 4, fig- 3- 



6962. Pteris russelli Newberry. Type. 



Laramie (Cret.). Vermejo Canyon, Colfax County, New 

 Mexico. 



Newberrv, Proc. U. S. Nat. Mus., V, 188^. p. 503; Mon. XXXV, 

 U. S' Geol. Surv., 1S98, p. 7, pi. 61, fig. i. 



20 Pteris subsimplex Lesqtiereux. Illu.strated specimens, 



to Denver (Cret. ). Golden, Colorado. 



22. Lesquereux, Rept. U. vS. Geol. vSurv. Terr., VII, Pt. II, 1878, p. 52, 



pi. 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., 187^, 

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

 p. 290, pi. 58, fig. 3. 



