514 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



occasionally coarsely tootlied ; nervation strong and regular ; the mid- 

 ribs of tlie divisions strong and straight, those from the second lateral 

 lobes springing from near the bases of the first lateral lobes ; secondary 

 nerves numerous, distinct, curved gently upward ; where the margins 

 are entire, partially camptodrome, where dentate, terminating in the 

 teeth ; tertiary nerves anastomosing to form quadrangular and very 

 luimerous areoles. 



Formation and locality. — Eocene Tertiary, Green Eiver, Wyoming. 

 Collected by Dr. C. A. White. 



56. Brasenia antiqua, n. sp. 



Stems long, flexuous, cylindrical (now flattened), smooth, many times 

 branched toward summit, bearing pedunculate si)heroidal capitula con- 

 sisting of numerous club-shaped pods. 



Formation and locality. — Eocene Tertiary, Green Elver, Wyoming. 



67. Gabomba gracilis, u. sp. 



Stem slender, smooth ; submerged leaves, set at intervals of half an 

 inch to an inch apart on the stem, opposite dichotomously and frequent- 

 ly branched, segments narrowly linear, or filiform, flattened, smooth, 

 truncated, scarcely distinguishable from the stems and leaves of C. 

 Caroliniana. 



Formation andlocaUty. — Tertiary strata. Fort Union, Dakota. Collected 

 by Dr. Ilayden. 



58. Cabomba grandis, n. sp. 



Stems smooth, originally cylindrical, now flattened ; leaves opposite, 

 many times dichotomously forked, spreading 4 to G inches long ; seg- 

 ments flat, 2 to 3 millimeters wide, smooth, truncated or slightly round- 

 ed at the extremities. Eesembles C. (jracilis in all respects, but very 

 mui:h larger. 



Formation and locality. — Tertiary strata. Fort Union, Dakota. Collected 

 by Dr. Hay den. 



59. Berberis simplex, n. sp. 



Leaves pinnate with three or more pairs of leaflets : leaflets ovoid, 

 rounded oremarginate at base, acute, with two to four large spiny teeth 

 on each side. 



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

 lected by Prof. Thos. Condon. 



60. Carpolithus spinosus, n. sp. 



Fruit enclosed in an exocarp composed of three elliptical or lentiform 

 segments, farrowed along the middle line of the dorsum and bristling 

 with erect, acute spines 6 to 8 millimeters long; i^eduncle cjiindrical, 

 strong, 1 inch or more in length. 



Formation and locality. — Upper Cretaceous ? North branch of Pur- 

 gatory Eiver, New Mexico. Collected by Mr. I. C. Eussell. 



