LESQUEKEux] ENUMERATION OF CRETACEOUS PLANTS. 339 



POPULITES LANCASTRiENSis, Lesqx^., Cret. Flor., p. 58, PI. Ill, fig. 1. 



Leaf large, coriaceous, broadly cordate, apparently poiiiied, entire or ivit/i 

 slightly undulate borders; nervation pinnate, subcamptodrome. 



Accordiug to Scliimper, this species is a true Populus. 



PoPULiTES ELEGANS, Lesqx., Cret. Flor., p. 59, PI. Ill, fig. 3. 



Leaves broadly oval or 7iearly round, narroiced by an abrupt curve to a 

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

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

 border-base of the leaf. 



Salix PEOTEiEFOLiA, 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. 



AMENTA0EJ3. 



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 ; nervatioti pinnate, craspedodrome. 



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

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

 presence of Betula leaves being improbable in the Cretaceous. 



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



Leaf thicTz, coriaceous, shining, linear, obtuse, entire; medial nerve thicJc; 

 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 veinlsts. 



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



Leaf linear lanceolate long (point brolcenj, gradually narrowed to a thicJc 

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

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

 todrome; tertiary veins short, anastomosing with branches 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 refliexed, minutely denticulate, 

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

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

 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) Zenlceri, Ett., Kreido 

 Flora vonXeidershoena, p. 23, PI. Ill, figs. 1,3, 11, wbich is also publish- 

 ed by Heer from Greenland, in the Arct. Flora. Tjjough 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 m 

 the European species, these difierences 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. Ettinghausen, however, remarks that the 

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



