VI TABLE OF CONTENTS. 



Synopsis of the Naiades Continued. Page. 

 Family Uniouida* Continued. 



Subfamily Unioninie Continued. 



Eschatigeme Continued. 



Genus Dromus 614 



Diagemu 615 



Strophitus 615 



Homogena> 620 



Anodonta 620 



Colletopterum 649 



Gabillotia 649 



Leguininaia 651 



Lastena 654 



Solenaia 655 



Gonidea 657 



Anodontoides 658 



Pegias 660 



Arcidens 661 



Sy uiphynota 662 



Alasmidouta 666 



Hemilastena 673 



Margaritana 674 



Unio 679 



Pleurobema 745 



Tetrageuaa 765 



Quadrula 765 



Schistodesruus 803 



Gibbosula 804 



Cuneopsis 804 



Subfamily Hyrianae 806 



Rosanorhamphus 806 



Genus Nodularia 806 



Harmaudia 827 



Grandidieria 827 



Physunio 830 



Dalliella 832 



Pseudodon 834 



Parreysia 840 



Ptychorhynchus 850 



Virgus 851 



Ctenodesma 852 



Eectidens 853 



Lamellidens 854 



Trapezoideus 858 



Arconaia 859 



Pseudavicula 860 



Arcidopsis 861 



Lamphorhamphus 862 



Tetraplodon 863 



Castalina 865 



Castaliella 866 



Callonaia 867 



Hyria 868 



Prisodon 869 



Diplodon 872 



