PLATE XXXVIII. 



Fig. 1. Ceriihiopsis ridicula, n. sp. 



a. The natural size. 



b. The shell, magnified 35 diameters. 



Fig. 2. Cerithiopsis turrigera, n. sp. 



a. The natural size. 



b. The shell, magnified 20 diameters. 



Fig. 3. Bittium perparvidum, n. sp. 



a. The natural size. 



b. The shell, magnified 20 diameters. 



Fig. 4. Bittium diplax, n. sp. 



a. The natural size. 



b. The shell, enlarged. 



Fig. 5. Bittium furvum, n. sp. 



a. The natural size. 



b. The shell, enlarged. 



Fig. 6. Bittium xanthum, n. sp. . 



a. The natural size. 



6. The shell, enlarged. 



Fig. 7. Bittium leucocephalum, n. sp. 



o. The natural size. 



b. The shell, enlarged. 



Fig. 8. Bittium porcellanum, n. sp. 



a. The natural size. 



b. The shell, enlarged. 



c. The apex, magnified 70 diameters. 



c. The apex, magnified 60 diameters. 



c. The apex, magnified 70 diameters. 



c. The apex, magnified 70 diameters. 



e. The apex, magnified 70 diameters. 



c. The apex, magnified 70 diameters. 



c. The apex, magnified 70 diameters. 



c. The apex, magnified 80 diameters. 



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