20 THE LATER EXTINCT FLORAS OF NORTH AMERICA. 



probably produced by the trees on which they were borne. In some cases 

 the cones were replaced by pyrites, and these represent the original form 

 and markings very perfectly, but require to be kept in alcohol or naphtha 

 to prevent oxidation. They will be found in my memoir on the Flora of 

 the Amboy Clays. 



Formation and locality: Cretaceous (Dakota group). Whetstone Creek, 

 New Mexico. (Excluding fig. 9.) 



Note. — In the discussion of this species Dr. Newberry mentions having 

 obtained cones from Nebraska and describes them, but does not refer to fig. 9, 

 PL XXVI, which is therefore questioned by me. — A. H. 



Sequoia Heeeii Lesq. 

 PI. XLVII, fig- 7. 

 Hayden's Ann. Kept., 1871 [1872], p. 290; Tert. Fl. (1878), p. 77, PI. VII, figs. 11-13. 

 Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon 

 Note. — The only reference by Dr. Newberry to this figure which I have been 

 able to find is a pencil memorandum of the name, on the plate, and the specimen 

 label giving the locality. — A. H. 



Sequoia Noedenskioldii Heerl 

 PI. XXVI, fig. 4. 



Fl. Foss. Arct., Vol. II (Miocene Fl. u. Fau. Spitzbergens, 1870), p. 36, PL II, fig. 13b; 



IV, figs, la, lb, and 4-38. 

 Taxites Langsdorfii Brong. ? Prod. (1828), p. 108. 

 Sequoia Langsdorfii (Brong.) Heer. FL Tert. Helv., Vol. I (1855), p. 54, PL XX, 



fig. 2; XXI, fig. 4. 

 " Sequoia Langsdorfii ? Br." Newberry, Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 



1868), p. 46; Ills. Cret. and Tert. PL (1878), PL XI, fig. 4. 



The leaves here figured are part of a large number of the same species 

 collected by Dr. Hayden on the banks of the Yellowstone River. They 

 are contained in fragments of a shaly argillaceous limestone, which have 

 their surfaces covered by disconnected twigs with their leaves attached, 

 that present the appearance of having been thrown down together, precisely 

 as the deciduous branchlets of our cypress are detached by the frost. 

 Among these are a few pieces of larger branches bearing short appressed 

 leaves, which I have conjectured to be the permanent foliage of the tree. 



