GEOLOGICAL SURVEY, CANADA PAPER 47-24 NATHORSTITES FAUNA ‘DARK SILTSTONES’ 10 Figure 1. Nathorstites mcconnelli var. lenticularis Whiteaves. Plesiotype, 9520. Figures 2, 3. Same variety. Plesiotype, 9521. Figures 4, 5. Nathorstites mcconnelli Whiteaves. PEHOeS. 9522. Figure 6. Same species. Plesiotype, 9523. Figure 7. Lobites pacianus McLearn. Plesiotype, 9524. Figures 8, 9. Same species, Plesiotype, 9525. Figure 10. Same species. Holotype, 8789. PLATE II