172 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



5061. Equisetum haguei Knowlton. Types. 



5139. Miocene (Tert.). Southeastern end of hill north of Eost 



Creek, Yellowstone National Park. 



Knowlton, Mon. XXXII, Pt. II, U. S. Geol. Surv., 1899, p. 674, 

 pi. 81, figs. 3, 4. 



38. Equisetum haydenii Eesquereux. Types. 



39. Green River (Tert.). Barrel Springs, Wyoming. 



Lesquereux, Ann. Rept. U. S. Geol. and Geog. Surv. Terr., 1871, 

 [1872], p. 284; idem., 1872 [1873], p. 385; idem., 1874 [1876], 

 p. 67, pi. 6, figs. 2, 3. 



40. Equisetum haydenii Eesquereux. Illustrated specimen. 



Earamie? (Cret.). Carbon, Wyoming. 



Lesquereux, Rept. U. S. Geol. Sun-. Terr., VII, Pt. II, 1878, p. 67, 

 pi. 6, fig. 4. 



2464. Equisetum hornii Eesquereux. Type. 



Eocene (Tert.). Cheny Creek, Wasco County, Oregon. 

 Lesquereux, Proc. U. S. Nat. Mus., XI, 1888, p. 23. 

 = Equisetum oregonese. 



2281. Equisetum knowltoni Fontaine. Type. 



Triasic. Copper mines, Albiquiu, New Mexico. 



Fontaine (in Fontaine and Knowlton), Proc. U. S. Nat. Mus., 

 XIII, 1890, p. 283, pi. 23, figs. 3, 4. 



43. Equisetum leevigatum Eesquereux. Type. 



Earamie (Cret.). Sand Creek, Colorado. 



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

 [1874], p. 395; Rept. U. S. Geol. Surv. Terr., VII, Pt. II, 1878, 

 p. 68, pi. 6, fig. 6. 



42. Equisetum laevigatum Eesquereux. Illustrated specimen. 



Earamie (Cret.) Golden, Colorado. 



Lesquereux, Rept. U. S. Geol. Surv., Terr., VII, Pt. II, I878, p. 68, 

 pi. 6, fig. 6. 



41. Equisetum lesquereuxii Knowlton. Type. 



Miocene? (Tert.). Near Yellowstone Eake, Yellowstone 

 National Park. 



Knowlton, Bull. No. 152, U. S. Geol. Surv., 1898, p. 94. 



See Equisetum limosum? 



41. Equisetum limosum? Einnseus. Illustrated specimen. 



Miocene? (Tert.). Near Yellowstone Eake, Yellowstone 

 National Park. 



Lesquereux, Ann. Rept. U. S. Geol. Surv., 1871 [1872], p. 299; 

 Rept. U. S. Geol. Surv. Terr., VII, Pt. II, 1878, p. 69, pi. 6, fig. 5. 



= Equisetum lesquereuxii. 



3245. Equisetum lyelli Mantell. Illustrated specimen. 



Potomac (Eow. Cret.). Fredericksburg; fishing hut above 

 Dutch Gap Canal, Yirginia. 



Fontaine, Mon. XV, U. S. Geol. Surv., 1S89, p. 65, pi. 1, fig. 7; 

 pi. 2, figs. 4, 5. 



