418 GEOLOGICAL SUEVEY OF THE TERRITORIES. 



parscMugiana, Heer, of the European Miocene, but remarkably distinct 

 by the absence of a midrib, whose place is scarcely indicated by a de- 

 pression in the middle of some of the leaflets. 

 Habitat. — Florisant, South Park, Frof. Cope. 



Acacia septbntrionalis, sp. nov. 



Leaflet small, entire, coriaceous, rigid, with a rough surface ; oblan- 

 ceolate, rounded to a short acumen or mucronate, gradually tapering 

 downward to the base ; nervation pinnate ; lateral veins very thin, aero- 

 drome, sparingly branching, anastomosing by cross-veinlets in passing 

 up to near the point where they curve toward the middle nerve. This 

 leaflet is, for its thick, rigid substance and its nervation, comparable to A. 

 rigida, Heer., (Fl. Tert. Helv., Ill, p. 133, Pi. cxl, Fig. 22,) diflering, how- 

 ever, by its form. 



Habitat.— South Park, near Oastello Eanch, Dr. Hayden. 



Leguminosites, species. 



A small legumen, which is open, and shows its two valves, linear, ob- 

 long, truncate, mucronate on one side, narrowed on the other to a short 

 pedicel 5 substance cartilaginous; inner face smooth, shining. The exact 

 form of this and the two following r.emaius is not well comprehensible 

 from mere description. 



Habitat. — Elko, Prof. Cope. 



€aepolithes, species. 



An oblong-obtuse, flattened fruit, or nutlet, truncate at its base, some- 

 what more enlarged on one side, marked from the base to above the 

 middle by small striae, slightly diverging in ascending. 



Habitat. — West of Florisant, Dr. A. C. Feale. 



Semen, species. 



An agglomeration of four oval, small seed,s, 3 to 4 millimeters long, 

 half as wide, obtusely-pointed, striate. 



Habitat. — Middle Park, Dr. Hayden. 



SPECIES WHOSE REFERENCE TO THE FORMER GROUPS IS UNCERTAIN. 



Lastr^a Styriaca, Heer. 



Fragments of ultimate linear pinnsB, pinnately alternately lobed ; 

 lobes oval-obtuse, disjointed to near the middle, pinnately-veined ; 

 A^eins 8 -pahs,, simple, curving inward in going up to the borders, thin, 

 -distinct. The species is represented by a number of fragments in silex, 

 all very distinct. By the form of the leaflets and their nervation, they 

 are referable to this species, very common in the Miocene of Europe. 

 The pinnules, however, are somewhat more disconnected than seen in 

 the figures, (Flor. Tert. Helv., I, PI. vii-viii.) 



Habitat. — Blake's Fork, Uintah Mountains. 



MUSOPHYLLUM COMPLICATUM, Sp. UOV. 



Stem thick, wrinkled-striate in the length, bearing imbricated and 

 amplectant leaves, folded upon another, especially near the point of union 

 to the stem, opening in right angle, variable in size, obtuse ; veins sim- 

 ple, three-fourths of a millimeter distant, parallel ; crossed in right angle 

 by obscure veinlets. The stem divides at its base into thick diverging 



