|888. J PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 15 



auricled at base, but the lateral lobes are open with short even obtuse 

 teeth of a far different facies. 

 Eleven specimens; Museum number, 1*413. 



Acer dimorphum, d. sp. Plate ix, tig. 1. 



Leaves large, palmately tbree-lobed; lobes oblong, lanceolate, dis- 

 tantly obtusely dentate, the lateral shorter, half open, prolonged at 

 base into two short triangular minutely dentate lobes or large teeth. 



The leaf has a peculiar facies, the medial lobe being large and long, 

 obtusely dentate, with few distant secondaries, and also few distant ob- 

 tuse teeth, while the lateral lobes open, diverging 50 degrees from the 

 medial nerve, have short obtuse teeth, numerous camptodrome or craspe- 

 dodrome secondaries, and are prolonged at their base into small lobes 

 opening like wings on both sides of the medial nerve. 



The relation of this leaf is with Acer grosse-dentatum Heer Fl. Tert. 

 Helv., iii, 54, PI. cxn, fig. 24), from which it differs by the pecurliar 

 characters of the lateral lobes. 



Two specimens; Museum number, 2415. 



Acer, fruits of. Plate VI, figs. 2, 3 ; vn, fig. 2. 



Seeds long and large-winged, broad-margined on the outer side; 

 nucleus large, apparently round (crushed). 



The seeds are comparable to those of Acer dasycarpoides Heer (Fl. 

 Tert. Helv., vol. iii, PL clv, fig. 7), the wiugs being, however, rounded, 

 not emargiuate at the middle. They most resemble those of Acer 

 dasycarpum Ehrh. of the eastern slope of the United States, and those 

 of A. macrophyllum Pursk, of California. The margin of the outer side 

 is, however, less enlarged and less compact at base in the living than 

 in the fossil seeds. These are most probably referable to the preced- 

 ing species. 



Three specimens; Museum number, 2417. 



Acer, branches of? 



Five specimens; Museum number, 2418. 

 Sapindus angustifolius Lx. 

 Two specimens ; Museum number, 2598. 



Khus Bendirei, n. sp. Plate ix, fig. 2. 



Leaf compound, leaflets oblanceolate, narrowed from below the mid- 

 dle to a short petiole, tapering above to an acute point, serrate to near 

 the base; medial nerve stout; secondaries parallel, curved in travers- 

 ing the blade; branching near the borders, craspedodrome with their 

 divisions. The leaflet is apparently a termiual one, longer and more 

 narrowed downward than the lateral oues. To these I refer a small 

 obbng lanceolate leaflet, rounded in narrowing rapidly to the point 

 of attachment, very short petioled, with small teeth, and areolation 

 identical. The substance of the leaves is membranous; the areolation 

 distinct, very small, irregularly round or angular, 



Three specimens ; Museum number, 2582, 



