20 



G. O. SAKS. 



[No. 1. 



24. Loxoconcha, G. 0. Sars. 



87. impressa, Baird. 134 ) 



88. guttata, Norman. 135 ) 



89. tamarindus, Jones. 136 ) 



90. fragilis, G. 0. Sars. 



25. Xestoleberis, G. 0. Sars. 



91. aurantia. Baird. 137 ) 



92. depressa, G. 0. Sars. 



26. Cytherura, G. 0. Sars. 



93. gibba, Muller. 



94. nigrescens, Baird. 



95. similis, G. 0. Sars. 



96. sella, G. 0. Sars. 



97. striata, G. 0. Sars. 



98. atra, G. 0. Sars. 



99. undata, G. 0. Sars. 



100. acuticostata, G. 0. Sars. 



101. affinis, G. 0. Sars. 



102. clathrata, G. 0. Sars. 



103. cellulosa, Norman. 138 ) 



27. Cytheropteron, G. 0. Sars. 



104. latissimum, Norman. 139 ) 



105. subcircinatum, G. 0. Sars. 



106. alatum, G. 0. Sars. 



107. hamatum, G. 0. Sars. 



108. testudo, G. 0. Sars. 



28. Pseudocythere. G. 0. Sars. 



109. caudata, G. 0. Sars. 



29. Bytliocytliere, G. 0. Sars. 



110. turgida. G. 0. Sars. 



111. constricta. G. 0. Sars. 



112. dromedaria, G. 0. Sars. 



113. simplex, Norman. 140 ) 



114. insignis, G. 0. Sars 



