FLORA OF THE GREEN RIVER GROUP. 167 



Lomatia acutiloba, ep. nov. 

 Plate XLIII, Figs. 11-16, 2(1. 



Leaves long, linear-lanceolate, alternately pinnately lobed; lobes lanceolate or 

 linear-lanceolate, acute, oblique, decurrent, gradually shorter upward, distinctly curved 

 backward. 



The divisions of the leaves, their shape and mode of decurring to a 

 primary axis, are of the same type as in Lomatia (TodeaJ Saportanea of 

 the "Cretaceous Flora" ("U. S. Geol. Rep."), vi, pi. xxix, figs. 1-4. 



Hah. — Florissant. Common, and seen in all the collections. 



Lomatia abbreviata, sp. nov. 



Plate XLIII, Fig. 17. 



Leaves linear or narrowly lanceolate ; lobes oblique, short, oblong, not decurrent, 

 cuneate at base, inclined upward, obtusely pointed ; nerves obsolete. ' 



This fragment appears related to fig. 10. 



Hub. — Florissant; very rare. Collection of the Princeton Museum. 



Lomatia interrupta, sp. nov. 

 Plate XLIII, Figs. 18, 19. 



Leaves linear-oblong, larger in the middle, either lobes bi-forni; larger, ovate, 

 entire or obtusely dentate, or smaller intermediate to the larger ones, merely oval- 

 obtuse, like short teeth. 



This peculiar form has the lobes of the top and the base of the leaves 

 simple, open, obtuse; in the middle the lobes become larger, obovate, ob- 

 tusely irregularly dentate, opposite, and near their base the wing of the 

 leaves is expanded into intermediate very small entire obtuse teeth. The 

 large lobes, when entire, have only the medial nerve distinct ; in the den- 

 tate ones the medial nerve is dichotomous, the branches passing up to the 

 teeth, one or two on each side. 



Hah. — Florissant; very rare. Princeton Collection, Nos. 842, 843. 



Lomatia micropbylla, Lesqx. 

 "U.S. Geol. Rep.," vii, p. 211, pi. lxv, fige. 14, 15. 



