64 CANADIAN FOSSILS. 
1859. The preceding notes were reproduced, with descriptions of five 
additional species of Graptolithus, one Retiograptus, the genus Thamno- 
graptus with two species, and one species of Rastrites. (Paleontology 
NV. Y., vol. iti, pp. 495 and 522.) 
1860. J. Hall, in continuation of the paper from the Twelfth Report 
on the State Cabinet (from Paleontology of New-York, vol. iii, Supp.), 
described additional species of Graptolithus, Retiograptus, Thamnograp- 
tus, and Rastrites as above. (Thirteenth Report of the State Cabinet, 
pp. 50-64, 1860.) 
1861. J. W. Salter in “ New Fossils from the Skiddaw Slates,” noticed 
the occurrence of several species of Graptolithus, and the discovery of a 
branching form similar to those which Sir William H. Logan first brought 
to light i Canada, which he proposed to term Dichograptus. (Geologist, 
vol. i, p. 74.) 
1861. Prof. McCoy sent to the writer a proof of a plate of graptolites 
from the ‘‘ Paleontology of Victoria.’ Among the figures are species closely 
resembling or identical with G. ramosus, G. furcatus, and G. gracilis ; 
while others resemble G. pristis, G. sagittarius, &c. The descriptions or 
farther illustrations have not come under our notice. 
1861. HE. Billings “ On the occurrence of Graptolites in the base of 
the Lower Silurian.’ The paper contained a review of the work of Freid- 
rich Schmidt, and a comparison of the graptolitic zones in Europe and 
America, with a view to show that the graptolite-schists of Norman’s 
Kill near Albany are not in the upper part of the Lower Silurian division. 
(Canadian Naturalist and Geologist, vol. vi, pp. 844 and 548.) 
1863. Sir William H. Logan recognized the occurrence of Graptolithus 
bicornis, G. ramosus, G. mucronatus, and G. pristis, characteristic spe- 
cies of the shales of Norman’s Kill, in the Utica and Hudson River forma- 
tions of Canada. (Geology of Canada, p. 200, and Catalogue of Fossils, 
p- 942. Idem, Graptolites of the Quebec group, pp. 226 and 228.) 
1863. J. W. Salter (Note on Skiddaw-Slate Fossils) noticed some 
new species of graptolites, proposing the new genus Zetragraptus, and 
describing the genus Dichograptus previcusly proposed and cited above. 
(Quarterly Journal of the Geological Society, vol. xix, pp. 185-140, 
with illustrations. ) 
.*, The Graptolithus from the Hoosic slate-quarries was named by 
Prof. Eaton Fucotdes secalinus, and the specimens were thus labelled in 
the cabinet of the Rensselaer School at Albany, as known to the writer 
from 1832 to 1836; but we have been unable to find any published 
description. 
