114 THE FLOKA OF THE DAKOTA GROUP. 



ill the lower part of the leaf. They are scarcely 5™" distant and ruu straight 

 toward the borders at an angle of divergence of 45° from the midrib. 



By form and size, and also by the secondary nervation, as far as can 

 be observed, this leaf is comparable to B. Oreadum Uug., as figured' in O. 

 Weber, Tertiarii. Niederrli. Braunkohleuform., PL iv, Fig. 4b. 

 Habitat: Kansas. 



Sapotacites, sp.? 

 PI. LXV, Pig. 3. 



Fragment of a membranous oval or elliptical leaf, round emarginate 

 at apex, gradually narrowed toward the base (destroyed); midrib narrow; 

 secondaries curved in passing toward the borders, at a very acute angle of 

 divergence, parallel. 



The exact form of the leaf is not ascertainable; the areolation also is 

 obscure; the divergence of the secondaries, of which there are four to five 

 pairs, is only 25° to 30°. 



Habitat: Ellsworth County, Kansas. No. 1189 of the collection of 

 Mr. R. D. Lacoe. 



Order MYRSINE^. 



Tribe EUMYRSINE^E. 



Myksine crassa, sp. nov. 

 PL LII, Figs. 2, 3. 



Leaves coriaceous, thickish, lanceolate, rounded in narrowing to the 

 base, entire, ])eiminerved; mith'ib narrow; secondaries thin, numerous, 

 oblique, ]>arallel, or curved and branching in or above the middle, mixed, 

 camptodrome; areolation very compact, irregular. 



The areolation of these leaves, though copied as exactly as possible, is 

 not distinct. It is comparable to that of some species of Myrsine, as M. 

 melanophlea R. Br.^ or M. UrviUei DC.,^ and to M. boreuUs Heer,^ which 

 represents a leaf much smaller, with an areolation less compact than that 

 of the leaves frt)m Kansas. A number of fragments are figured by Heer 

 (loc. cit.), ]jut all are smaller and more diiferent in appearance from those 

 from Kansas. One is 9""° long, S-S"" to 4™ broad at the middle; the other, 



'Ettingshausen, Blatt-Skelete der Dikotyledonen, p. 85, Fig. 51. 



-Ett., ibid., p. 84, PI. xxxi, Kig. 4. 



=>F1. Fobs. Arct., vol. 6, 2 Abth., p. 81, PI. xxiv. Fig. 7b. 



