576 WARREN S. SMITH 



Genus Laurus 

 Laurus cascadia N.Sp. (Figs. 6 and 7, A, B, B 1 ) 



This specific name is given to several excellently preserved 

 specimens in the shales of F831. There is variation among the 

 forms, but hardly more than to permit of naming of two varieties. 

 The leaf is ovate lanceolate, coming to a sharp slender tip, and 

 slightly unsymmetrical at the obtusely pointed base. There are 

 six to eight pairs of strong secondaries, the members not directly 

 opposite, besides a rather faint pair at the base, where the mem- 

 bers are opposite. Secondaries come off at an angle of about 70 

 or less, as in Fig. 7, and are very gently bowed. The tertiaries 

 show a horizontal parallel arrangement all the way across the 

 leaf, so that they do not join the secondaries at right angles, except 

 in the case of the two lower pairs. Fig. 6 shows preserved a fine 

 network of veins between the tertiaries. The margin of the leaf 

 is entire, and the ultimate veins border it in a series of loops. 

 About one-quarter inch of petiole was found (Fig. 6). In Fig. 6 

 the breadth is 38 mm., the length probably 100 mm. The two 

 pieces figured are not parts of one leaf. In Fig. 7 the dimensions 

 are 32X80 mm., and here A and B are two sides of the impression 

 of one leaf. A small form, very like Fig 6, but not drawn, was 

 about 18X35 mm. L. cascada resembles L. similis of Knowlton 

 (Rept. on Fossil Plants Associated with Lavas of Cascade Range of 

 Oregon, PI. V, Figs. 1 and 4) merely in the horizontal tertiaries 

 and in the angle of the secondaries. Tip and base are, however, 

 quite different in the two forms. The base of L. perdita comes 

 nearest to being as blunt as that of L. cascadia. 



Laurus cascadia leve var. nova (Duror) and L. cascadia (type) 

 differ largely, in that the former is proportionately broader and 

 with somewhat heavier veins. 



Genus Magnolia 

 Magnolia nordenskioldi (Heer) 



Heer: Flora Foss. Arct., VII, "Gronlands," 123; Taf. CVIII, Figs. 2, 3; IV. 

 "Spitzbergens," 82; Taf. LII, Fig. 1. 



This reference is made doubtfully on certain fragments from 

 the sandstone of F 844. The size of the leaf, strength, and irregular 



