70 



BIBLIOGRAPHY OF 



Pa. PI. Fig. 



9 i 7-11 



11 ii 1-3 



13 ii 4^7 



15 iii 1-3 



IS iii 4-6 



19 iii 7-9 



21 iv 1-3 



23 



iv 



16-18 



25 



iv 



4-7 



27 



iv 



19-23 



29 



iv 



8-10 



30 



iv 



11-15 



4 



i 



1 



6 



i 



2 



7 



i 



3 



8 



i 



4 



9 



i 



5 



10 







11 



i 



6 



12 



i 



7 



14 



i 



8 

 Index— 



4 of cover 



4 





(( 



4 





(( 



Name. 

 Planorbia campauulatus Say. 



glabratus Say. 



trivolvis Say. 



P. corpulentus WMttemore. 

 regularis Lea. 



Bulla fluviatalis Say. 

 trivolvis var. fallax. 



P. lenius Gould. 

 lentus Say. 

 corpulentus Say. 

 exacutus Say. 



P. exacuous Say (err. typ.) 

 lens and Brogniarti Lea. 



Paludina hyalina Lea. 

 dilatatus Gould, (preoc. ?) 



P. dilatus Hald. 

 deflectus Say. 



P. virens Adams. 

 parvus Say. 



P. elevatus Adams. 

 albus Mailer. 



P. hispidus Drap. 

 hirsutus Gld. 

 armigerus Say. 



Ancylus rivularis Say. 



Locality. 

 N. Engl., N. Y., Ohio, 



111., N. W. Terr. 

 S. Car., Mexico? New 



Orleans, Oregon. 

 New England, N. Y., 



Pa., N. W. Terr. 



Mass., Lake Erie, Ind. ? 



New Orleans, S. C. 

 N. W. Terr., Oregon. 

 New England, N. York, 

 Western States. 



Mass., O.jDeL riv.,Md. 



New England, OMo, N. 

 W. Terr. 



East., Midd., & West. 

 States, N. W. Terr. 



N. England, Lake Su- 

 perior, &c. 



East., West., & Midd. 



States, N. W. Terr. 

 Del. and Susq. rivers, 



var. in James river. 

 Holston river, Va. 

 Wabash, Vermont. 

 Ohio. 



Nolachucky river. 

 Bl'k Warrior riv., Ala. 

 New England. 



depressus Hald. 



tardus Say. 



diaphanus Hald. 



obscurus Hald. 



filosus Conr. 



parallelus Hald. 



A. rivularis Gould non Say. 



fuscus Adams. Fresh pond, Cambridge, Mass 



crassus Hald. Oregon. 



-Planorbis parallelus Say. = 



Helix lineata? 

 Amnio ola tenuipes Couper. Hopeton, Ga. 



Melania substricta Hald. Tennessee. 



conica Say (name restored). 



substricta Hald. (withdrawn from the species). 



pilula Lea = Anculosa littorina Hald. 



