106 CANADIAN FOSSILS. 
EXPLANATIONS OF FIGURES OF GRAPTOLITHUS RIGIDUS, Hall. 
PuLatE XI. 
1. A fragment preserving the centre and principal branches. 
2. <A larger specimen, showing the principal ramifications of the branches. This 
and the preceding specimen show only what appears to be the non-cellu- 
liferous portion of the frond. 
3. 
The extreme parts of some branchlets laterally compressed, showing the cellu- 
liferous parts of the frond. 
4. An enlargement of one of the branchlets of fig. 3. 
A strong branch with part of the branchlets, showing the lower side or non- 
celluliferous portion of the frond. 
Formation and Locality—Quebec group ; Point Lévis. 
GRAPTOLITHUS ABNORMIS, Hall. 
Plate XI, figure 6. 
(G. aBnormis, Hall: Geological Survey of Canada, Report for 1857, page 117.) 
Description—Frond consisting of numerous slender bifurcating stipes, 
bilaterally arranged. Radicle minute; funicle long, bifurcating on each 
side ; distance between the bifurcations one third of an inch; the divisions 
diverging at a little less than a right angle, while the inner subdivisions (or 
those adjacent to the radicle ), after the second subdivision, diverge at right 
angles to the funicle. Stipes branching several times, one division showing 
four bifurcations beyond that of the funicle, giving ten branches for the 
quarter, or forty for the whole frond : stipes and subdivisions sub-cylindrical, 
being rounded on the lower side, grooved in the centre upon the upper side, 
and curving at the bifurcations : the width from one to two hundredths 
of an inch; free from cellules to the fourth division, counting that of the 
funicle as the first division. The stipes and branches maintain nearly the 
same dimensions throughout their entire length. Outer divisions appa- 
rently celluliferous. Cellules obscure, marked only by undulations upon 
the margin of the branches. 
This species, in its general aspect, resembles G. Logani and G. flezilis ; 
but differs in important particulars. The funicle is more slender, and 
nearly twice as long as in either of those species; the divisions of the 
funicle makes a lesser angle, and the divisions of the stipe near the base 
