17 
Phylum, BRYOPHYTA 
Class, HEPATIC AE 
Order, Marchantiales 
Genus, Marchantites Brongniart 
Marchantites sp. 
A small fragment of a narrowly linear, forked, thallose liverwort occurs 
in the Estevan beds along a road up a hill in SE. ^ sec. 28, tp. 7, range 3, 
W. 4th mer. It is too incomplete for description. Similar but larger 
forms occur in the Lower Eocene of France, the Mississippi Gulf embayment, 
and in the Lance formation of Montana. 
Phylum, ARTHROPHYTA 
Order, Equisetales 
Genus, Equisetum Linn^ 
Equisetum sp. 
The original and counterpart of the upper part of a long internode 
with sheath at the node. Internode preserved for a length of 3-5 cm. 
and 8 mm. in maximum width, showing twelve wide, rather flat ridges. 
The sheath is about 1 cm. long and is crowned with sharp, linear, lanceolate 
teeth free for 6 to 7 mm. and connate for their basal 3 or 4 mm. 
The specimen is somewhat similar to the Green River Equisetum 
wyomingense Lesquereux, but differs in the greater length of both internode 
and sheath. It is distinct from any Tertiary species known to m*e. A 
nominal species of Equisetum has been recorded^ by Knowlton from the 
Lance formation, and there are three nominal species known from the 
Fort Union. These are all poorly known — E. canaliculatum Knowlton 
is a robust form with more numerous stem ridges and short sheaths; 
E. decidium Knowlton is based upon a large, detached entire sheath; and 
E. globulosum Lesquereux is based on a very slender rhizome with tubers. 
The present specimens, although probably representing a new species, 
are too incomplete to serve as types. Ravenscrag, above a coal seam 
below road bridge on central branch of Fairwell creek, sec. 28, tp. 7, range 
24, W. 3rd mer. 
Equisetum rhizome 
A Cctst of a rather stout Equisetum rhizome showing three somewhat 
inflated internodes each about 2*5 cm. in length comes from the Estevan, 
Eagle Butte near the centre of sec. 35, tp. 7, range 4, W. 4th mer. It is 
much like the specimens from the Lance formation of Rocky creek, Sas- 
katchewan, which I referred to Equisetum articum Heer^. 
^Knowlton, F. H.: Proc. Wash. Acad. Sci., vol. 11, p. 198 (1909). 
®Berry, Edward W.: Canadian Field Nat., vol. 38, pp. 131-132, Fig. 1 (1924). 
