30 FLORA OF THE MONTANA FORMATION. 
Amboy clays. The only possible point of difference is in size, the speci- 
mens under consideration being somewhat smaller than most of the 
figured examples of this species from Kansas and New Jersey. They are 
at best only fragments which might have come from the tips of small 
branches. In any case the arrangement of branchlefcs and scale-like 
leaves is the same. It is also possible that the reduction in size may 
be due to the fact that the species was nearing extinction, a view some- 
what supported by the fact that the specimens from the Amboy clays 
of New Jersey are in general smaller than the original specimens from 
Kansas. 
Habitat. — Dakota group, Salina, Kansas. Amboy clays, South 
Amboy, New Jersey. One mile northwest of Harpers on the Union 
Pacific Railroad, Wyoming. Coal mine on the north fork of Dutton 
Creek, between Rock and Cooper creeks, Wyoming. 
WIDDRINGTONIA? COMPLANATA Lx. 
Widdringtonia 1 *. complanata Lx., Bull. U. S. Geol. and Geog. Surv. Terr., Vol. I, 
p. 336 (1875); Ann. Rept. U. S. Geol. and Geog. Surv. Terr., 1874, p. 299 (1876); 
ibid., 1876, p. 499 (1878); Tert. PI., p. 72, PI. LXII, figs. 13, 14 (1878). 
The two figured types of this species are preserved in the United 
States National Museum (Nos. 85, 86). The species is a very clearly 
marked one, and can not possibly be confounded with any known 
American fossil. It is reported as being abundant at Point of Rocks, 
Wyoming, its only known habitat, yet comparatively large recent col- 
lections fail to contain it. 
The question as to generic relationship is still an open one. The 
specimen was doubtfully referred by Lesquereux to Widdringtonia, 
but as he supposed it to be related to W. antiqua Sap., 1 he provisionally 
placed it in this genus. Saporta, to whom specimens were evidently 
sent, was inclined to regard it either as a new type or as possibly 
belonging to Arthrotaxis or even Dacrydium. Schenk, 2 judging from 
the figures alone, was of the opinion that it could not properly be 
referred to Widdringtonia, and concluded that the smaller specimens 
(figs. 13, 13a) should be referred to Moriconia. The figures seem to be 
very unlike, but when they are compared with the specimen, fig. 13 is 
found to be wrong. It is not regularly marked, as indicated in the 
figure, but has more the appearance of fig. 13a. The leaves are more 
pointed and less regular, and not so closely appressed, thus removing 
much of its resemblance to Moriconia. Even then it seems quite unlike 
fig. 14, but the latter is the reverse, and it was only by removing a piece 
of the covering of a small branch that the general similarity to the 
other could be made out. 
In the absence of new material, and hence of conclusive evidence, I 
have preferred to retain the species as indicated by Lesquereux. 
Habitat. — Point of Rocks, Wyoming. 
1 l&tude, 2, p. 69, PI. I, fig. 4. 
2 Zittel, Handbuck d. Palsecmtol., Abth. II, p. 313 (1890). 
