512 PROCEEDINGS OF UNITED -STATES NATIONAL MUSEUM. 



Formation and locality. — Tertiary rocks, valley of Tongue Eiver, Wyo- 

 iiiinji,. Collected by Dr. Hay den. 



46. Ficus Alaskana, n. sp. 



Leaves large, reaching 8 to 10 inches in length and breadth ; trilobcd, 

 generally uusymmetrical ; lobes pointed, usually obtuse ; margins en- 

 tire or locally undulate; nervation strong, conspicuously reticulate; 

 principal nerves, three, giving ojtt' branches, which divide near the mar- 

 gins, sometimes connecting in festoons, sometimes craspedodrome ; ter- 

 tiary nervation forming a coarse net-work of usually oblong meshes 

 filled with a fine polygonal reticulation ; upper surface of the leaf 

 smooth and i^olished, lower roughened by the reticulation of the nerves. 



Formation and loealify. — Tertiary strata, Cook's Inlet and Admiralty 

 Inlet, Alaska. Collected by Captain Howard, U. S. N. 



47. Ficus membranacea, n. sp. 



Leaves sessile, 4 to 6 inches in length, by 2i to 3A in width; ovate, 

 abruptly and usually blunt pointed, narrowed to the base, generally 

 uusymmetrical, margin entire, nervation delicate, open, camptodrome; 

 10 or more branches given off on either side of the midrib, curving up- 

 ward, and forming a festoon near the margin. 



Formation and locality. — Tertiarj^ strata, Cook's Inlet, Alaska. Col- 

 lected by Captain Howard. 



48. Ficus Condoni, n. sp. 



Leaves large, sometimes nearly 2 feet in length, three to five lobed, 

 slightly decurrent, and the petiole sometimes stipulate ; njargins entire, 

 or gently undulate ; nervation very strongly marked and closely retic- 

 ulate, roughening the surface, camptodrome, but nerve branches some- 

 times terminating in the margins of the middle lobe. 



Formation and locality. — Tertiary beds. Bridge Creek, Oregon. Col- 

 lected by Prof. Thos. Condon. 



49. Ficus (protoficus) nervosa, n. sp. 



Leaves large, 8 to 10 inches in length by o inches wide, oval in out- 

 line, ])()inted at the summit, rounded at the base ; nervation crowded, 

 remarkably exact and regular ; midrib strong and straight, 12 or more 

 branches on either side, nearly equidistant, simple, strongly arched up- 

 ward, forming a festoon along the margin ; tertiary nervjition consisting 

 of numerous nearly simple and straight cross-bars, connecting the sec- 

 ondary branches at right angles, and short nervules running off from 

 the midrib at right-angles ; margins entire. 



Formation and locality. — Light grey sandstone, Laramie Group, Evans- 

 ton, Utah. 



50. Protoficus inequalis, n. sp. 



Leaves 4 to 5 inches long, by 3 inches wide; oval, pointed at the sum- 

 mit, narrowed and rounded at the unsymmetrical base ; margins entire 



