135 



L. sta^nalis, Linn. 



R. ampla; Mighels. 

 R. columella, Say. 



B. iiiegrosonia, t^ay. 



L. reflex a, Say. 

 L. elodes,^*^ Say. 

 L. desidiosa, Say. 

 L. eiuarginata, Say. 



L. cataseopium, Say. 

 L. umbilicata,^^ Adams. 

 L. pallida, Adams. 

 L. humilis, -Sfcri/. 



Family LIMNAEIDAE. 



Subfamily LIMNAEINAE. 

 LIMNAEA, Lamarck. 



r 



Ingalls; Lewis; Robinson. 



Subgenus RADIX, Montf. 



Aldricli. 

 Ingalls ; Lewis. 



Subgenus BULIMNEA, Uald. 



Lake Champlaiu (Ingalls), [Adams' Vermont 

 Shells.] 



Subgenus LIMNOPHYSA, Fitz. 



B. & B., Western New York. ? 



Aldricli ; Ingalls ; Lewis ; Hubbard. 



Aldricli ; Ingalls ; Lewis. 



Owasco Lake (Lewis). Probably will be found 



in other lakes. 

 Ingalls ; Lewis. 

 Aldrich; Ingalls; Lewis. 



Lake Chamjilain (Adams); Little Lakes (Lewis). 

 Aldrich ; Ingalls ; Lewis. 



A. gracilis, Jay. 

 A. galbaiia,'! Say. 



P. Hildretliiana, Lea. 

 P. anclllaria, Say. 



Subgenus ACELLA, Uald. 



Aldrich (in letters) ; Ingalls ; Lewis ; Squaw 



Island, Niagara River (David F. Day). 

 (Fossil) Lewis. [In calcareous tufa.] 



PHYSA, Bra^). 



Robinson. 



Aldrich ; Ingalls ; Owasco Lake (Lewis). 



10 Say's name for this species is retained, because tlieywho identify our shells with analogous 

 European forms do not preserve the parallel by identifyins; catascojnuin with pereger. as should 

 follow, as a natural sequence. The full discussion of this topic would require too much space at 

 this time. 



n Eastern collectors hesitate to place umbilicata in the synonjiny of L. caperala, Say, which 

 seems to be related to umbilicata as rejiexa is to elodes. 



