70 
Sequoia heterophylla Velenovsky (?) 
Sequoia heterophylla Velenovsky, Gymnos. Bohrn. Kreidef. p. 22, PI. 12, 
fig. 12; PL 13, figs. 2-4. 6-9 (1885). 
Newberry, Mon. U.S. GeoL Surv., vol. 26, p. 49, PI. 6, figs. 1-13 (1896). 
Knowlton, Bull. U.S. GeoL Surv., No. 257, p. 132, Pl. 16, fig. 5 (1905). 
Berry, Md. GeoL Surv., Upper Cretaceous, p. 785, Pl. 53, fig. 2; PL 
54, fig. 7 (1916). 
This identification is queried because it is based on a single specimen 
of a distal part of a twig, although there is slight ground for doubting 
that it is not the same as the other occurrences on this continent that have 
been referred to this species. 
It was based, in the first instance, on material from the Cenomanian 
and Emscherian of Bohemia, and its distinguishing characteristic, as there 
defined, is its heterophylly, the proximal leaves being reduced and appressed 
and the distal leaves longer, spreading, and distichous, much like those of 
the widespread Tertiary Taxodium langsdorfii Heer. In the western 
hemisphere Sequoia heterophylla is not uncommon in the Atlantic Coastal 
Plain from the Raritan formation to the Black Creek and Bingen formations. 
It occurs in the Patoot beds of western Greenland, in the Judith River 
beds of Montana, and in the Mesaverde formation of Wyoming. 
Taxodium (?) sp. Knowlton 
Taxodium (?) sp. Knowlton, U.S. GeoL Surv., Prof. Paper 101, p. 252, 
Pl. 32, figs. 1, 2 (1918). 
Two fragments of a twig and a somewhat larger but poorly preserved 
specimen are all the material representing this form in the collection. 
They cannot be distinguished from the rather obscure remains from the 
Vermejo formation which Knowlton referred tentatively to the genus 
Taxodium. They indicate a conifer with a distichous habit and with 
relatively large, flat, lanceolate-falcate, alternate leaves, narrowed prox- 
imad to a short petiole which is decurrent. The midveins are very poorly 
defined and appear to have been immersed in the rather coriaceous leaves. 
The leaves are relatively large and thick for Taxodium, which is also 
not certainly known from rocks older than the Tertiary. It differs from 
the type of a conifer generally referred to the genus Sequoia, and the 
material is too incomplete and poorly preserved to admit of a more precise 
determination. It would have been better to have referred it to some such 
noncommital form genus as Elatocladus, but since the remains* from the 
Allison formation cannot be distinguished from those described by Knowlton 
from the Vermejo formation of New Mexico, I can see no advantage in 
changing the name from Taxodium (?) to Elatocladus, 
Angiospermophyta 
Platanus sp. 
Plate XII 
There are a large number of specimens of the central part of a large 
leaf which is distinctly platan oid in venation, as well as in the general 
