15 
NEW SPECIES OF DEVONIAN CRINOIDEA FROM 
NORTHERN CANADA 
By Frank Springer 
Crinoids from the Great Slave Lake region, Northwest 
Territories, said to be from rocks of upper Devonian age, have 
been submitted, by E. M. Kindle, for examination. The 
material consists of two calices numbered 5643, and a calyx 
with some unidentifiable stem fragments numbered 5658, from 
a horizon about 200 feet higher. Both belong to the genus 
Melocrinus, having four basal plates, a characteristic fossil of 
the Stringocephalen-Kalk of the Eifel; they do not belong to 
the European type, however, but are closely related to species 
occurring in formations of the Hamilton group in western New 
York, Wisconsin, Iowa, and Missouri. Lithologically they are 
closest to the Missouri species. 
The Missouri forms were described by Rowley 1 in 1893 
and 1894 under three species derived from shales overlying the 
Calloway limestone, forming the upper member of the central 
Missouri Devonian, in Calloway county, Missouri. This 
formation was referred to the Hamilton by the early geologists; 
subsequent detailed study has led the later authorities to con- 
sider it as late Meso-Devonian, or perhaps early Neo-Devonian. 
The geology of the region has been discussed by Keyes 2 and 
Greger, 3 and its relation to the Interior Continental Devonian 
areas to the northward by Meek, 4 5 Schuchert, 6 and Weller. 6 
.From these discussions it is clear that the fossils of the Missouri 
and Mackenzie Devonian belong to the same palaeontological 
province, and are of approximately the same age. The char- 
acters of the crinoids in question are consistent with these 
1 Am. Geol., vol. 12, p. 303, and vol. 13, pp. 151, 153. 
2 Geol. Surv., Miss., vol. 4, 1894, p. 43; Bull. Geol. Soc. Am., vol. 13, 
1902, pp. 271-273. 
3 Am. Jour. Sc., vol. 27, 1909, p. 374. 
^rans. Acad. Sc., Chicago, vol. 1, 1869, pp. 61-144. 
5 Am. Geol., vol. 32, 1903, p. 143; Bull. Geol. Soc. Am., vol. 20, p. 545 
6 Jour. Geol., vol. 17, 1909, p. 264. 
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