302 
AUG. F. FOERSTE 
Their crests are broadly rounded and are approximately of the 
same width as the intervening grooves. The annulations rise 
toward a point which is slightly toward the left of the median 
line of the figure here published. 
In the moderate curvature of the annulations, both specimens 
resemble Dawsonoceras rather than Cyclendoceras. In addition 
to the two specimens described above, a third one was sent by 
Dr. Holtedahl. Two of them apparently present faint traces 
of vertical ribs, but not sufficiently distinct to give confidence 
to their determination as Dawsonoceras. In the absence of 
any knowledge of their siphuncles, their apparent association 
with Ordovician forms favors their reference to Cyclendoceras. 
Locality and Horizon. — From some unknown locality on 
Boothia Felix or King William Land. Collected in 1903-04 
by the Gjoa expedition. Deposited in the Palaeontologisk 
Museum, at Kristiania. From the Silurian, in strata equivalent 
to the Niagaran or Guelph. 
I 
27. Eurystomites (?) boreale Foord 
Plate XXXIII, figs. 9 A, C 
Trochoceras boreale Foord, Catalogue of Fossil Cephalopoda 
in the British Museum of Natural History, pt. II, 1891, p. 23. 
Original description. — ‘^Sp. Char. Shell discoid, compressed, whorls 
in contact, about three in number, all exposed. Section elliptical, the 
ratio of the two diameters about as 6 : 8 ; siphuncle between the centre 
and the convex side. Septa approximate; two lines apart on the sides, 
where the shell has a diameter of 11 lines, increasing to 2J lines where 
the diameter is IJ inches. Body-chamber and test unknown. There 
are no indications of ribbing or of any ornaments upon the cast. 
‘^Remarks. This is a much larger species than any of those of the 
Niagara rocks of North America that come at all near to it. Trocho- 
ceras Aeneas, Hall, agrees with it in the distance of the septa and 
position of the siphuncle, but the section is different, and there are 
marks of very distinct annulations upon the cast. Salter (Journal of 
a Voyage in Baffin^s Bay and Barrow Straits in the years 1850-1851, 
by Dr. P. C. Sutherland (1852), Appendix, p. ccxxii) described, amongst 
