346 REFERENCE TO PLATES, VOL. XVIII. 



FIGURE PAGE 



64, 65. Opeas green Girard. Jornal 143 



66. Opeas lucida = = bawriense Pils. Journ. of Conch.. . 146 



67. Opeas crenulatum Sm. Journ. of Malac 146 



68. Opeas lentum Sm. Journ. of Condi 147 



69. Opeas venustum Sm. Journ. of Conch 146 



70. Opeas hamonvillei Dautz. Mem. Soc. Zool. Fr 143 



71. Opeas stenostomum Sm. Ann. Mag 147 



72. Opeas limpidum Marts. D. Ostaf r 148 



73. Opeas streptosteloides Marts. D. Ostaf r 148 



74. Opeas crawf ordi M. & P. Ann. Mag 149 



75. 76. Opeas durbanense Stur. Denkschr. Akad. Wien . 149 



77. Opeas rncbeani M. & P. Ann. Mag 150 



78. Opeas tugelense M. & P. Ann. Mag 150 



79. Opeas strigile M. & P. Ann. Mag 150 



80. Opeas longulum Morel. Journ. de Conch 152 



PLATE 16. 



81. Opeas javanicum Rve. Sumatran specimen 138 



82. 83. Opeas layardi Bens. Specimen , 158 



84. Opeas soror Sm. Proc. Malac. Soc 177 



85. Opeas brevius Sm. Proc. Malac. Soc 177 



86. Opeas avenaceum Morel. Specimen 153 



87. Opeas avenaceum Morel. Journ. de Conch 153 



88. Opeas javanicum Rve. Conch. Icon 138 



89-91. Opeas kusaiense Pils. Co-types 182 



PLATE 17. 



92-94. Opeas mauritianum Pf r. Mauritius specimen. . . . 133 



95. Opeas mauritianum Pfr. Maui specimen 133 



96. Opeas mauritianum Pfr. Conch. Cab 133 



97. Opeas clavulinum hawaiiense Sykes. Proc. Malac. 



Soc 136 



98. Opeas m. prestoni Sykes. Proc. Malac. Soc 134 



99, 100. Opeas m. prestoni Sykes. Ceylon specimen .... 134 



101, 102. Opeas m. obesispira Pils. Type 134 



PLATE 18. 



1. Opeas g. panayense Pfr. Ostas. Landschn 131 



2. Opeas g. panayense Pfr. Conch. Icon 131 



3. 4, 5. Opeas gracile Hutt. Ahmednuggur specimens. . . 125 



6. Opeas gracile Hutt. Ryukyu specimens 125 



7. Opeas cereum (= gracile). Conch Icon 128 



8. 9. Opeas satsumense Pils. Types 172 



10. Opeas gracile Hutt. Washington 1 128 



