2(38 MESOZOIC FLOKAS OF UNITED STATES. 



Order RANALES. 



' Family MEXISPERMACE.E. 



Genus MENISPERMITES Lc's(iiutoux. 



Mexispermites CALiFoRXK rs Fontaiiip ii. sp. 



PL LXIX, Ficrs. 12-14. 



Several specimens of what appears to lje a new species of Menis- 

 permites were found at locality Xo. 23 in what is proljably the top of 

 the Horsetown beds. The specimens are all small fragments of leaves 

 that do not suffice to show the shape and size of the leaves to which 

 they Ijelonged. They evidently came from leaves of different sizes and 

 possibly from two different species of Menispermites. The nervation, 

 however, is so markedly like that of the genus that there can be little 

 doubt that it is present. 



PI. LXIX, Fig. 12, represents what appears to De the l^asal portion 

 of a small leaf. This shows a main nerve from which, near its base, 

 two subordinate nerves go off opposite each other. From these last 

 minor nerves go off nearly at right angles and unite to form irregular 

 (jiiadrangular meshes. Fig. 13 gives a fragment of what must have 

 Ijeen a rather large leaf, possibly of a different species from that repre- 

 sented by Fig. 12. There is in this fragment a principal nerve from 

 which subordinate nerves go off, and these send off minor nerves, as 

 in Fig. 12. But the ultimate nerves in the fragment depicted in Fig. 13 

 are much slenderer than those of that shown in Fig. 12. Probably 

 the reason is the fact that the latter fragment comes from the basal 

 portion of a leaf. Fig. 14 depicts a fragment of a leaf showing the char- 

 acteristic dichotomous forking of the terminal portion of one of the 

 principal nerves. 



Order SAPINDALES. 



Family SAPINDACEiE. 



Genus SAPINDOPSIS Fontaine. 



Sapindopsis oregonensis Fontaine n. sp. 



PI. LXIX, Figs. 15-17. 



Two specimens of what seems to be the same species of dicotyledon 

 were obtained from Oregon. 



