PLATE XXIII. 



a. The natural size. 



b. The shell, enlarged.^ 



c. The apex, magnified 30 diameters. 



d. The sculpture, magnified 20 diameters. 



a. The natural size. 



b. The shell, enlarged. 



c. The apex, magnified 30 diameters. 



d. The sculpture, magnified 20 diameters. 



a. The natural size. 



b. The shell, enlarged. 



c. The apex, magnified 40 diameters. 



PAGE 



Fig. 1. Pleurotoma (Mangelia) corallina, n. sp. . . . . .343 



Fig. 2. Pleurotoma (Tliesbia) eritima, n. sp. . . '. . 329 



a. The natural size. | b. The shell, enlarged. 



Fig. 3. Pleurotoma (Mangelia) acanthocles, n. sp. . . . .342 



Fig. 4. Pleurotoma (Mangelia) subtilis, n. sp. ..... 339 



a. The natural size. j Z>. ^Tlie shell, enlarged. 



Fig. 5. Pleurotoma (Mangelia) eritmeta, u. sp. . . . . .341 



a. The natural size. | b. The shell, enlarged. 



Fig. 6. Pleurotoma (Mangelia) macra, n. sp. . . . .345 



a. The natural size. I c. The apex, magnified 30 diameters. . 



b. The shell, enlarged. 



Fig. 7. Pleurotoma (Mangelia) levuhensis, n. sp. . . . . . 340 



a. The natural size, | b. The shell, enlarged. 



Fig. 8. Pleurotoma (Bela) clyscrita, n. sp. . . . . .314 



a. The natural size. c The apex, magnified 30 diameters. 



b. The shell, enlarged. 



Fig. 9. Clathurella (Dajjhnella) aulacoessa, n. sp. . . . .307 



