LESQUEEEux.] PALEONTOLOGY LIGNITIC FLOEA SPECIES. 405 



Habitat. — Golden, Black Butte, &c,, rare. 



Ehamnus kectinervis, Heer. 



A fragmentary specimen found at Coal Creek, Colorado, by A, B. 

 Maricine, is referable to this species. The leaf is, however, shorter 

 and broaderj(,than those representing this species from Black Butte, the 

 Eaton Mountains, and Golden. 



Ehajmnus Goldianus, Lesqx. 



This species, described in Eeport for 1872, (p. 382,) is very common at 

 Golden, and its numerous leaves, as seen from the specimens, are ex- 

 tremely variable. The small form is oval, obtusely or abruptly pointed, 

 rounded at base to a short petiole; lateral veins close, 3 millimeters dis- 

 tant, more or less ramified, especially in the middle or near the base of 

 the leaves ; nerviiles nearly as thick as the veins, very close, and oblique 

 to the veins. This form closely resembles Berchemia multinervis, Heer, 

 differing merely by the narrower, more lanceolate form of the leaves, 

 more rounded or cordate at the base, by the nerviiles more oblique to 

 the secondary veins, and by their divisions, the veins being all simple 

 in Berchemia. To this species is, perhaps, referable the small leaf from 

 Marshall, described as B. parvifolia, Lesqx., in Ain. Jour. Sci. and 

 Arts, (vol. xlv, p. 207.) I am unable to compare the specimens com- 

 municated to me by Dr. J. Leconte, and now out of my hands. Two 

 figures of these leaves, which were carefully made, do not show any 

 trace of ramification of the secondary veins. 



Habitat. — Most abundant at Golden ; the variety with large leaves 

 has been found also at Black Butte. 



Ehamnus inequalis, sp. nov. 



Leaf ovate, lanceolate, apparently rounded to the petiole, (point and 

 base of leaf destroyed;) medial vein turning to one side near the point; 

 lower secondary veins at an angle of divergence of 25°, and at a greater 

 distance from the second pair, which is more open and parallel to those 

 following it in ascending, all simple ; nerviiles numerous, distinct at 

 right angle to the veins. Intermediate to the lower pair of secondary 

 veins, and the more distant second pair above, there is a thick tertiary 

 vein passing out to the middle of the leaf, and there anastomosing on 

 both sides with nerviiles. By its unequal sides and its nervation this 

 fragment is related to U. (Eningensis, Heer, (Fl. Tert. Helv., Ill, p. 78, 

 PI. cxxiii, Fig. 31.) 



Habitat. — Golden. 



Ehamnus alaternoides, Heer. 



A very small leaf, 14 millimeters long, 7 millimeters broad, oval, 

 pointed, narrowed to the base, distinctly nerved by 5 i^airs of lateral 

 veins, the lowest opposite, the others alternate, curving near and aloug 

 the borders, which are irregularly and distantly serrate. This leaf has 

 the same form and characters of nervation as those of the species 

 described by Heer in Fl. Tert. Helv., (Ill, p. 78, PI. cxxiv, Figs. 21-23,) 

 being intermediate for the size between Figs. 21 and 22. The middle 

 nerve is thick ; the lateral veins distinct and at irregular distances. 



Habitat. — Golden. 



Ehamnus MertaniC?), Heer. 



Leaf oblong, enlarging gradually from the rounded narrow base to 

 above the middle, where it is abruptly acuminate and shar])ly and dis- 



