T. D. A. Cockerell — Descriptions of Tertiary Plants. 543 



elliptica Unger, from the Miocene of Radoboj, is close to A. 

 spoliatd in respect to the submarginal venation, but very 

 different in the cnneate base, the leaf being very like that of 

 Crescentia latifolia. 



Juglans leonis D.n. 



Juglans californica Lx., Mem. Mus. Comp. Zool. vi, 34, 

 pi. ix, x (1878). Miocene of California. (Not J. californica 

 S. Watson, Proc. Am. Acad., x, 349 (1875).) 



Rhus mensce n.n. 



Rhus* metopioides Lx., Mem. Mus, Comp. Zool. vi, 31 

 (1878). Miocene of California. (Not R. metopioides Turcz., 

 Bull. Soc. Nat. Mosc, xxxi, 1, 468 (1858).) 



Salix merriami n.n. 



Salix elliptica Lx., Mem. Mus. Comp. Zool. vi, 10 (1878). 

 Miocene of California. (Not S. elliptica Sleich., Ser., Ess. 

 Saul., 44; cf. Steud., nom. (1841).) 



Zizyphus microphyllus Lx., and Magnolia lanceolata Lx., 

 of the California Miocene, also bear preoccupied names. 



Weinmannia dubiosa Ckll. 



We found this at Stations 13 B and 14, at Florissant. The 

 leaflets vary from five to seven. 



Robinia brittoni sp. nov. Fig. 8. 



Represented by a leaf, scarcely at all different from the 

 living R. pseudacacia L. Five leaflets are preserved. Leaf- 

 lets about 22 mm long and 9-J- broad, very briefly mucronate at 

 apex, and with short petiolules about 2 mra long, which are as 

 usual opposite, the pairs about 14 mm apart. From the first 

 pair of leaflets to the insertion of the leaf is only 12 mm . The 

 shortness of the petioles agrees best with R. viscosa Tent., but 

 the shape of the leaflets accords better with R. pseudocacia. 

 Florissant, Station 13 B (Jlelford Smith, 1908). Dedicated 

 to Dr. N. L. Britton, who has contributed so much to our 

 knowledge of American trees. 



Robinia is to-day confined to America, but it is found fossil 

 at (Fningen and other European localities. 



JSlenyanth.es coloradensis sp. nov. Fig. 9. 



Represented by a crown bearing five leaves, in form and 

 appearance exceedingly like the living 3f. trifoliata L., but 



