60 - CANADIAN FOSSILS. 
1828. Ad. Brongniart described two species of graptolites from the 
Transition formation at ‘* Pomte Lévi prés Québec dans le Canada,” as 
Fucoides dentatus and /. serra.* (Histoire des Végétaux Fossiles, pp. 10 
and 71, pl. vi, fig. 7-12.) 
1829 [18317]. F. Holl republished the description of Orthoceratites. 
serratus of Schlothem. (Handbuch die Petrefacten., vol. 1, p. 234.) 
18—? Prof. Nilsson recognized the graptolites as polyps belonging 
to the ceratophydians. He proposed to substitute the pre-occupied name 
of Priodon for that of Graptolithus. (See Dr. Beck, in Murchison’s 
Silurian System, p. 696.) 
1835. Prof. Bronn, adopting the opinion of Prof. Nilsson regarding 
the nature of graptolites, gave the name Lomatoceras (Lethea Geognos- 
tica, vol. i, p. 50, pl. 1, fig. 13, L. priodon), at the same time arranging 
the species with the orthoceratites, etc. 
1857. Hismger described five species of graptolites from the rocks 
of Sweden, adopting the generic name Prionotus, created by Prof. 
Nilsson. Among these are two species of Linnzus, P. sagittarius and 
P. scalaris ; to which he added the new species P. pristis, P. foliwm, and 
P. convolutus. (Leth. Suecia, p. 118, pl. 85.) In the second supple- 
ment to that work, published in 1840, two other species are added, under 
the names P. geminus and P. teretiusculus; the latter being of the type 
of G. scalaris. (Supp. ui, p. 5, pl. 88.) 
1839. Sir Roderick Murchison described and figured in the: Silurian 
System three species of graptolites, G. Ludensis, G. Murchisoni, and 
G. foliaceus. (Sil. System, p. 695.) 
1840. Prof. Hichwald published a description of Zomatoceras distichus, 
a graptolite from the Silurian formation of Esthonia. (Stl. Syst. im 
Esthiand, p. 101.) 
1840. Prof. Quenstedt sought to re-establish the opinion that the grap- 
tolites are true orthoceratites. (WV. Jahrb. f. Min., p. 275.) 
1842. Prof. Geinitz described and figured five species of graptolites 
under the names G. foliaceus, Murchison, G. priodon, Bronn, G. La- 
densis, Murchison, G. serratus, Schloth., G. scalaris, Linn., and G. 
spiralis, Geinitz; regarding them as belonging to the Cephalopoda. 
(NV. Jahrb. f. Min., p. 697.) 
1842. Vanuxem identified a graptolite of the Utica slate with the 
Fucoides dentatus of Brongniart. Graptolithus dentatus, Vanuxem, 
G. pristis, Hall, His.? (Geol. Rep. 38d Dist. N. Y., p. 57, fig. 2.) 
1843. Gen. Portlock, in his Geological Report, discussed the nature 
* These species are probably identical with those which I have heretofore described 
as G. pristiniformis and G. bryonoides. 
