LESQUEKEux.l ENUMERATION OF CRETACEOUS PLANTS. 339 



Populites lancastriensis, Lesqx., Cret. Flor., p. 58, PL III, fig. 1. 



Leaf large, coriaceous, broadly cordate, apparently pointed, entire or with 

 slightly undulate borders; nervation pinnate, subcamptodrome. 



According to Schirnper, this species is a true Populus. 



Populites elegans, Lesqx., Cret. Flor., p. 59, PI. Ill, fig. 3. 



Leaves broadly oval or nearly round, narrowed by an abrupt curve to a 

 long, slender petiole ; borders entire, undulate ; nervation pinnate, subcamp- 

 todrome, the lower primary veins joining the middle nerve a little above the 

 border-base of the leaf. 



Salix prote^folia, Lesqx., Cret. Flor. p. 60, PI. V, figs. 1-4. 



Leaves lanceolate, gradually tapering to an obtuse point, largest at or 

 more generally below the middle, narrowed to a short petiole ; coriaceous, 

 surface polished. 



AMENTACEJS. 



Betula beatriciana, Lesqx., Cret. Flor., p. 61, PI. V, fig. 5; PI. XXX, 



fig. 4. 



Leaves small, rhomboidal-obovate in outline, cuneiform from the middle to 

 the petiole, rapidly tapering from above the middle to a point, simply dentate 

 in the upper part, entire to the base ; nervation pinnate, craspedodrome. 



In his critical notes, Count Saporta says that these leaves might be, 

 perhaps, detached leaflets of some species of Gissus or Araliopsis, the 

 presence of Betula leaves being improbable in the Cretaceous. 



Myrica obtusa, Lesqx., Cret. Flora, p. 63, PI. XXIX, fig. 10. 



Leaf thick, coriaceous, shining, linear, obtuse, entire; medial nerve thick; 

 secondary veins thin, nearly at a right angle to the middle nerve, curving 

 near and along the border in marginal festoons, anastomosing, from the mid- 

 dle or above, with the branches of intermediate short veinlets. 



Myrica cretacea, sp. nov. PI. Ill, fig. 4. 



Leaf linear lanceolate long (point broken), gradually narrowed to a thick 

 petiole; minutely denticulate on the borders, secondary veins parallel, dis- 

 tant, at an acute angle of divergence from the flat broad middle nerve, camp- 

 todrome; tertiary veins short, anastomosing with brandies of the second- 

 ary ones. 



The figure shows the only fragment known of this species. The sub- 

 stance of the leaves is subcoriaceous, rather thick, the surface smooth 

 or polished ; the borders, slightly reflexed, minutely denticulate, 

 evidently so, but not quite as deeply as marked upon the figure ; 

 from the broad middle nerve, the secondary veins, irregular in distance 

 and branching, ascend, in an acute angle of divergence, about 30° to near 

 the borders, which they closely follow by ramifications. The areolation 

 is not distinguishable. 



The leaf is comparable to Myrica (Dryandroides) Zenker i, Ett., Kreide 

 Flora vonNeidershoeua, p. 23, PI. Ill, figs. 1, 3, 11, which is also publish- 

 ed by Heer from Greenland, in the Arct. Flora. Though our leaf is 

 larger and the denticulation of the borders of a different character, 

 in right angle to the borders not as pointed and turned upward as in 

 the European species, these differences might be merely local and the 

 species identical. A close comparison is not possible, from the absence 

 of the characters of the secondary nervation, on the specimens of 

 Europe and of Greenland. Ettiughausen, however, remarks that the 

 teeth of the borders are minute and acute, or slightly obtuse and close, as 



