PLATE XXXIV 
Fig. 1, Leurorthoceras chidleyense Sp. nov. A, ventral side. B, lateral side. 
C, cross-sections at top and bottom of specimen, showing location of siphuncle 
at bottom. D, vertical section along dorso-ventral plane, showing siphuncle. 
From loose blocks of Black River limestone, found at Port Burwell, 20 miles 
west of Cape Chidley at the northern end of Labrador. No. 7923, Geol. Surv., 
Canada. 
Fig. 2. Leiirorthoceras hanseni Gen. et Sp. nov. Vertical section along dorso- 
ventral plane of same specimen as fig. 1 on pi. 30. The specimen was cut diago- 
nally sufficiently to cause the siphuncle to appear narrower toward the top, though 
in reality it enlarges slightly in that direction. From the Black River limestone 
either on Boothia Felix or on King William Land. 
Fig. 3. Orthoceras sp. A, dorso-lateral view, with ventral side on right, not 
showing the maximum slant of the sutures of the septa. B, cross-section, show- 
ing the slight flattening of the ventral side and the location of the siphuncle.’ 
From the Valley south of Borgen in Goose Fjord in southwestern Ellesmereland. 
From strata comparable wdth the Keyser member of the Helderbergian. In the 
Palaeontologisk Museum, Kristiania: collected by Per Schei in 1902. 
