GEOLOGICAL SURVEY, CANADA PAPER 47-24

NATHORSTITES FAUNA

‘DARK SILTSTONES’

Figure 1. Profrachyceras zauwae McLeam. Holotype, 9045.
Figures 2, 3. Protrachyceras sikanianum McLearn. Plesiotype, 1494.
Figures 4, 5. Same species. Holotype, 9044.

PLATE I