A Sttidt/ of the I'dfdsitcs of the I'ulon'uhc. 408 



ber of infested males and females for each species did not 

 differ materially. The exceptions are as follows : 



Unio heterodon, 4 males, females. 



Anodonta suborhiculata, 18 males, 2 females. 



Plagiola securis, 5 males, females. 



Lampsilis parvus, males, 31 females. 



Lampsilis hievissimus, 4 males, females. 



Lampsilis tenuissimus, 5 males, females. 

 The disparity of the sexes in these few species has no 

 significance, however, in this connection, for in no case where 

 both sexes were liberally represented in the host species 

 could a different capacity for infestation be established for 

 the two sexes. The only seeming exception, in the case of 



i>reviously in common use. The specific nahies remain the same, except that comu- 

 tus becomes rejlexa, &i\A plana is now Considered a form of graiuiis. 



Quadrula multiplicata Unio multiplicatus 



tuberculata tuberculatus 



metanevra metanever 



lachrymosa hichrymosus 



asperrima asperrimus 



pustulata pustulatus 



granifera graniferus 



pustulosa p\istulosus 



plicata plicatus 



trigona trigonus 



rubiginosa rubiginosus 



ebena ebenus 



Unio gibbosus gibbosus 



complanatus complanatus 



heterodon Iieterodon 



Alasmodonta confragosa Margaritana confragosa 



complanata complanata 



rngosa rngosa 



marginata marginata 



uiidulata uiiduhita 



tappaniaiia Unio tappanianus 



Strophitns edenlulus Anodonta edentula 



Anodonta imbeeilis imbecilis 



' suborhiculata suborhiculata 



grandis plana 



corpulenta corpulenta 



Oblii|Uaria retlexa Unio cornutus 



Plagiola securis securis 



elegans elegans 



donaciformis donaciformis 



Lampsilis parvus parvus 



ellipsis ellipsis 



higginsii higginsii 



ligamentinus ligamentinus 



luteolus luteolus 



nasutus nasutus 



anodontoides anodontoides 



rectus rectus 



ochraceus. , ochraceus 



ventrieosus ventricosus 



alatus alatus 



l.Tvissimus livvissimus 



gracilis gracilis 



tenuissimus tenuissimus 



