with Descriptions of X w Species of /'■ sstl I'/,, :.\ 



not without example in JRhamnus, as it is even more conspi 

 ous in some species of the genus, as for example in /«' 'olia 



of the Cape of Good Hope. A cross between thai Bpeciee and 

 our Berclumia, with a greater development of the marginal 

 dentation than either exhibits, wonld give us the fossil before tiB. 



Considering it to exhibit more of the character of the Rham- 

 nacece than of any other family, I have placed it doubtfully 

 there. 



Formation and Locality. Miocene strata. Fori Union, Da 

 cotah. (Dr. Ilayden.) 



Sapindtis afliiii* (n. ep.) 



Leaves pinnate in many pairs of leaflets, with a single Ian 

 terminal one; leaflets smooth, thick, lanceolate, long-pointed, 

 sessile or short-petioled, unsymmetrical, rounded or wedge-shaped :it 

 base; nerves fine and obscure, ten or more branches diverging from 

 the midrib on either side at somewhat unequal distances, and of 

 unequal size. These arch upward, giving off several lateral 

 branches at right angles, or nearly so, and die out near the margins, 

 or are carried round in a curve parallel with it, and thu> oonm 



These leaves are most strikingly like those of Sapind t/a, and 

 taken by themselves would afford perhaps sufficient ground 

 for uniting them with that genus. They are also very 111 

 series of leaves found in the Tertiaries of Europe, figured by 

 Prof. Heer, in the Flor. Tert. Helvet. Taf. cxix. and cxx. under 

 the names of S<tpin<1 »« falcifoH "*. s - <!, n^rolius^ and 8. dub* 

 The nervation is also the same; so there can hardly bea do 

 that our plant and those of Prof. Beer are gent rica 

 cal, and, if the proofs before him of the identity 

 with the living genus Sapinckts are sufficient, we mo 

 elude that the specimens before ne are also the repn 

 of that genus. In our specimens, however, tb< 

 stantly shorter and broader than in the species I have men- 

 tioned," and are often rounded at the bfl thai I hav< 

 compelled to regard them 88 specifically distinct 



