^^^^] A Collection of Fossil Woods. 85 



cannot be regarded as having any special stratigraphical signifi- 



cance. 



As bearing upon the present studies, it is worthy of note that 

 m his discussion of the Flora of the Judith Ri^•er beds Knowlton 

 records at least three species of Sequoia. s Two of these are 

 represented by foliage and small branches only. 5. reichenbachii 

 (Gemitz) Heer, is known to extend from the Dakota formation 

 to the Belly River vSeries, m whicn it is found in Canada 5 

 heterophylla is a well known Cretaceous form of both Europe and 

 America, and m the latter it ranges from the Later Potomac 

 to the Willow Creek Series. 



The third species is represented bv a cone only, as obtained 

 from the Judith River beds ten miles north of Wild Horse Lake 

 Alberta. This species, which Knowlton does not distino-uish bva 

 specific name, he nevertheless finds to be very near to'^'s heerii 

 Lesq., although it likewise greatly resembles certain cones of 

 5. reichenbachii from the Kome beds of Greenland as described 

 by Heer. It may be the fruit of the wood now under discussion 

 It IS, however, impossible to correlate these isolated specimens 

 more completely at this time. 



From the brief survey of the material thus presented it is 

 clear that the different species possess no special value for strati 

 graphical purposes, but they do extend our knowledge of their 

 geological range and geographical distribution in important and 

 interesting ways. 



5. Geol. & Pal. Judith River Beds. U. S. Geol. Surv., Bull. 2S7,~1905, 131-132 



DESCRIPTION OF FIGURES. 



Sequoi.^ Albertensis .\. SP. 

 Fig. 1 . Transverse section showing the general character of the structure. 



Fig. 2. Transverse .section showing the double summer wood of the 

 broader growth rings, x 52. 



Fig. 3. Tangential .section showing the character ol the mcduihiry rays. 



Fig. 4. Radial section of a medullary ray, sh<.wing character and 

 numbers of pits, x 227.,v * cuaiacier and 



Fig. 5. Radial .section showing the two-seriate bordered uits nf th^ 

 spring tracheids. x 227.5. ' '^"^ 



Fig. 6. Radial section showing the number and position of bordered 

 pits on the tangential walls of the summer wood. 



