SYSTEMATIC INDEX. 



PAGE I 



XI 



105. Pisidium fermgineum, 



Prime. 71 



106. Pisidium ventricosum, 



Prime. 72 



107. Pisidium rotundatum, 



Prime. 72 



108. Pisidium occidentale, Nc. 



73 



PAGE 



109. Pisidium ultramontanum, 



Prime. 75 



110. Pisidium consanguineum, 



Prime. 76 



111. Pisidium contortum, Prime. 



73 



