84 CANADIAN FOSSILS. 
Formation and Localities—Shales of the Quebec group ; three miles 
above river St. Anne, and at Pomt Lévis. 
11. GRAPTOLITHUS BRYONOIDES,* Hall. 
Plate IV, figures 1-11; Pl. III, figs. 11, 12 (2); Pl. VI, fig. 4 (?). 
(G. srronorpss, Hall: Geological Survey of Canada, Report for 1857, page 126. Fucoides 
serra, Brongniart, Végétaux Fossiles, vol. i, page 71, 1828.) 
Description.—Frond consisting of four simple stipes, united in pairs at 
their bases, and connected by a short funicle of variable length, from the 
centre of which proceeds a minute pointed radicle. The stipes diverge at 
various angles (dependent probably on distortion from pressure) ; narrow 
at their origin, and abruptly expanding above, they acquire their full width 
within the distance of three or four cellules, and maintain the same through- 
out their length to near the distal extremity, which is somewhat abruptly 
rounded and occupied by the partially-developed cellules. The full width 
of the stipes in young individuals is often not more than one twelfth of an 
inch, and in mature specimens about one seventh of an inch; the base 
having a diameter of not more than two or three hundredths of an inch. 
The common body occupies avery narrow space, and the solid axis is strongly 
defined in the flattened specimens. The substance of the stipe or pellicle 
is quite thin and apparently smooth, the only markings visible being the 
oblique strize made by the cell-partitions. 
Cellules elongate, of medium width, somewhat curved, and in the fully- 
developed condition about four times as long as wide, making an angle 
of from 40° to 50° with the axis; free for about one fourth of their length ; 
about from twenty to twenty-four in the space of an inch, varying in differ- 
ent individuals and in different stages of growth. Aperture curved, 
making an angle of about 110° with the axis; the cell-denticles pointed, 
* T have little doubt that this species is identical with Fucoides serra of Brongniart 
(Vég. Fossiles, p..70, 1828). The locality of that species is “‘ Pointe Levi prés Quebec,” 
which is the same with that of G. bryonoides: and the figures of Brongniart correspond 
with figs. 9 and 10 of plate 4 of this memoir. The Fucotdes dentatus of the same 
author is also probably identical with G. pristiniformis of this memoir, being from the 
same locality. It is only since these descriptions have been in print, and published 
references made to them, that I have discovered this identity, or I would have pro- 
posed to substitute the specific names of Brongniart for those given by me in 1857. 
I take the first opportunity of making the correction. 
