SOUTH AFRICAN MAEINE MOLLUSKS. 261 



Fig. 5. Melanella cifara, new species, type, length 2.1 mm., p. 69. 



6. Melanella irafca, new species, type, length 5.5 mm., p. 69. 



7. Melanella carifa, new species, type, length 4.1 mm., p. 65. 



8. Melanella acrifa, new species, type, length 9.2 mm., p. 68. 



Plate 21. 



Fig. 1. Marginella almo, new species, type, length 5.4 mm., p. 41. 



2. Marginella cosmia, new species, type, length 11.7 mm., p. 37. 



3. Marginella lepta, new species, type, length 5.1 mm., p. 40. 



4. Mitra ima, new species, type, length 9 mm., p. 44. 



5. Cythna africana, new species, type, length 0.7 mm., p. 120. 



6. Amphithalamus africanus, new species, type, length 1.2 mm., p. 127. 



7. Alvania almo, new species, type, length 2.1 mm., p. 128. 



8. Alvania alfredensis, new species, type, length 1.5 mm., p. 128. 



9. Microsetia irma, new species, type, length 1.6 mm., p. 133. 



Plate 22 



Fig. 1. Leptothyra africana, new species, type, greater diameter 7.2 mm. (top), p. 147. 



2. Leptothyra africana, new species (profile), p. 147. 



3. Leptothyra africana, new species (bottom), p. 147. 



4. Leptothyra spuria Gould (top), cotype, greater diameter 6.5 mm., p. 146. 



5. Leptothyra spuria Gould (profile), p. 146. 



6. Leptothyra spuria Gould (bottom), p. 146. 



Plate 23. 



Fig. 1. Gibbula loculosa Gould (top), cotype, greater diameter 8.5 mm., p. 153. 



2. Gibbula loculosa Gould (bottom), p. 153. 



3. Gibbula loculosa Gould (profile), p. 153. 



4. Leptothyra quantilla Gould, type, greater diameter 2.8 mm. (top), p. 148. 



5. Leptothyra quantilla Gould (profile), p. 148. 



6. Leptothyra quantilla Gould (bottom), p. 148. 



7. Leptothyra carminea, new species, type, greater diameter 3.3 mm. (top), p. 148. 



8. Leptothyra carminea, new species (profile), p. 148. 



9. Leptothyra carminea, new species (bottom), p. 148. 



10. Clanculus alfredensis, new species, type, greater diameter 8.7 mm. (profile), 



p. 150. 



11. Clanculus alfredensis, new species (top), p. 150. 



12. Clanculus alfredensis, new species (bottom), p. 150. 



Plate 24. 



Fig. 1. Eeliacus africanus, new species, type, greatest diameter 9.6 mm. (top), p. 123. 



2. Calliostoma africana, new species, type, altitude 12.8 mm. (profile), p. 162. 



3. Eeliacus africanus, new species (bottom), p. 123. 



4. Calliostoma africana, new species (top), p. 162. 



5. Eeliacus africanus, new species (profile), p. 123. 



6. Calliostoma africana, new species (bottom), p. 162. 



7. Haliotis alfredensis, new species, type, length 5.5 mm. (exterior), p. 175. 



8. Haliotis alfredensis, new species (interior), p. 175. 



Plate 25. 



Fig. 1. Calliostoma eucosmia, new species, type, greater diameter 20 mm. (top), p. 161. 



2. Calliostoma eucosmia, new species, (bottom), p. 161. 



3. Calliostoma eucosmia, new species (profile), p. 161. 

 80737°— Bull. 91—15 18 



