SYSTEMATIC INDEX. 1 1 



Pages 



80. Tellina Fabula. Streaked-shelled TeUina, 216,280 



FAMILY IX. SOLENINA, . 216, 281 



26. SOLEN. SOLEN, ..... 216,281 



81. Solen Siliqua. Kazor-case Solen, . . 216, 2S2 



82. Solen Ensis. Sabre-case Solen, . . 216, 282 



83. Solen pellucidus. Pellucid Soleo, . . 216, 283 



27. PSAMMOBIA. PSAMMOBIA, .... 216, 283 



84. Psammobia Feroensis. Feroese Psammobia, . 216, 2S4 



28. SAXICAVA. SAXICAVA, .... 217, 284 



85. Saxicava rugosa. Wrinkled Saxicava, . . 217, 285 



86. Saxicava arctica. Arctic Saxicava, . . 217, 285 



FAMILY X. MACTRINA, . 217, 286 



29. MACTRA. MACTBA, . . . . 217,287 



87. Mactra stultorum. Simpleton's Mactra, . 217, 287 



88. Mactra solida. Thick -shelled Mactra, . . 217, 288 



89. Mactra elliptica. Elliptical Mactra, . . 217, 288 



90. Mactra subtruncata. Small Triangular Mactra, . 217, 289 



30. GOODALLIA. GOODALLIA, .... 218,289 



91. Goodallia triangularis. Denticulate Goodallia, . 218, 289 



92. Goodalliaminutissima. Edentulate Goodallia, . 218,290 



31. LUTRARIA. LUTRARIA, .... 218,290 



93. Lutraria elliptica. Elliptical Lutraria, . . 218, 291 



94. Lutraria Listen. Lister's Lutraria, . . 218, 291 



32. AMPHIDESMA. AMPHIDESMA, . , . 218,292 



95. Amphidesma album. White Amphidesma, . 218, 292 



96. Amphidesma tenue. Triangular Amphidesma, . 218, 293 



97. Amphidesma prismaticum. Iridescent Ampbidesma, 218, 294 



32. ANATIXA. ANATINA, .... 219,294 



98. Anatina prsetenuis. Delicate Anatina, . . 219, 294 



99. Anatina truncata. Truncated Anatina, . . 219, 295 



34. THRACIA. THRACIA, .... 219, 295 



100. Thracia declivis. Sloping Thracia, . . 219, 296 



101. Thracia pubescens. Roughish Thracia, . 219, 296 



35. ERVILIA. ERVILIA, .... 341 



102. Ervilia pellucida. Pellucid Ervilia, . . 341 



FAMILY XI. MYINA, . . 219, 297 



36. MYA. GAPER, ..... 219,297 



103. Mya truncata. Abrupt Gaper, . 220, 298 



104. Mya arenaria. Sand Gaper, . . . 220, 298 



105. Mya ovalis. Oval Gaper, . . . 220, 299 



37. LYONSIA. LYONSIA, .... 220,299 



106. Lyonsia Norwegica, Pearly Lyonsia, . . 220, 300 



38. SPHENIA. SPHENIA, .... 220,300 



107. Sphenia Swainsonii. Swainson's Sphenia, . 220, 301 



108. Sphenia costulata. Ribbed Sphenia, . . 220, 301 



