﻿CONTKNTS 



Ksciiatic,i:nmv 340 



DuoMi'S 341 



DiAGKN.K 344 



S'lKorii rrrs 344. 



homocen-k 358 



Anodonta 358 



coli.etopterum 438 



Gahii.lotia 440 



i^egumtnaia 444 



Lastena 452 



soeenaia 455 



GONIDEA 463 



Anodontotdes 466 



Pegias 472 



Arctdens 475 



Arkansia 477 



s^■mphynota 480 



Al.ASMIDONTA 492 



Margaritana 511 



Unio 527 



Pi.EUROBEM A 732 



Tetragene.^ 810 



OUADRUI.A 811 



vSCHISTODESMUS 939 



GlBI'.OSULA 941 



CuNEopsis 943 



Subfamily Hyrianse 949 



ROSANORHAMPHUS 949 



Genus Nopuearia 949 



Harmandia 1049 



Grandidieria 105 1 



Physunio 1062 



SiMPSONEELA 1069 



Pressidens T077 



Psi'unoDON 1079 



