PLATE XX. 



PAGE 



Fig. 1. Clathurella (Daphnclla) monoceros, n. sp. . . . .365 



a. The natural size. c. The sculpture, magnified 6 diameters. 



b. The shell, enlarged. 



Fig. 2. Pleurotoma (Surcula) syngenes, n. sp. . . . . 293 



a. The natural size. a I c. The sculpture, magnified 6 diameters. 



b. The shell, enlarged. | 



Fig. 3. Pleurotoma (Surcula) staminea, n. sp. . . . .286 



a. The shell, natural size. | b. The sculpture, magnified 6 diameters. 



Fig. 4. Pleurotoma (Surcula) goniodes, n. sp. . . . . .291 



a. The natural size. 



b. The shell, enlarged. 



c The sculpture, magnified 5 diameters. 



Fig. 5. Pleurotoma (Pleurotomella) papyracea, n. sp. . . . .338 



a. The natural size. 



b. The shell, enlarged. 



c. The sculpture, magnified 5 diameters. 



Fig. 6. Clathurella chariessa, u. sp. . . . . . .352 



a. The natural size. 



b. The shell, enlarged. 



c. The apex, magnified 15 diameters. 



Fig. 7. Pleurotoma (Genota) engonia, n. sp. . . . . 300 



a. The natural size. 



b. The shell, enlarged. 



e. The sculpture, magnified 5 diameters. 



Fig. 8. Pleurotoma (Genota) atractoicles, n. sp. ..... 301 



a. The natural size. 



b. The shell, enlarged. 



c. The sculpture, magnified 10 diameters. 



