172 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



5061. Equisetum haguei Knowlton. Types. 



5139. Miocene (Tert.). Southeastern end of. hill north of I_,ost 



Creek, Yellowstone National Park. 



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

 pi. 81, figs. 3, 4. 



38. Equisetum haydenii Lesquereux. Types. 



39. Green River (Tert.). BarrelSprings, Wyoming. 



Lesquereux, Ann. Kept. 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 Lesquereux. Illustrated specimen. 



Laramie? (Cret.). Carbon, Wyoming. 



Lesquereux, Rept. IJ. S. Geol. Surv. Terr., VII, Pt. II, 1S78, p. 67, 

 pi. 6, fig. 4. 



2464. Equisetum hornii Lesquereux. Type. 



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

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

 = Equisetum oregonese. 



2281. Equisetum knowltoni Fontaine. I'ype. 



Triasic. Copper mines, Albiquiu, New Mexico. 



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

 XIII, 1890, p. 2S3, pi. 23, figs. 3, 4. 



43. Equisetum laevigatum Lesquereux. Type. 



Laramie (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 Le.squereux. Illustrated specimen. 



Laramie (Cret.) Golden, Colorado. 



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

 pi. 6, fig. 6. 



41. Equisetum lesquereuxii Knowlton. I^ype. 



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

 National Park. 



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



See Equi.setum limosum? 



41. Equisetum limosum? Linnaeus. Illustrated specimen. 



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

 National Park. 



Lesquereux, Ann. Rept. U. S. Geol. Surv., 1871 [1S72], p. 299; 

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



= Equisetum lesquereuxii. 



3245. Equisetum lyelli Mantell. Illustrated specimen. 



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

 Dutch Gap Canal, Virginia. 



Fontaine, Mon. XV, U. S. Geol. Surv., 1889, p. 65, pi. i, fig. 7; 

 pi. 2, figs, 4, 5. 



