72 BIBLIOGRAPHY OF 



Pa. PI. Fig. Name. Locality. 



6 i 5-10 Valvata sincera Say. N. W. Terr., Vermont. 



9 humeralis Say. Mexico. 



10 i 11-13 pupoidea Gould. Boston. 



In a Supplement to Part I. — October, 1840. 



1 Melania interrupta JIald. Tennessee. 



1 suturalis JIald. Ohio. 



1 exilis JIald. Kentucky and Ohio. 



1 substricta JIald. for M. conica Say, preocc. 



Subgenera of ANCULOSA. 



1 Anculosa Say. 



1 Lithasia JIald. 



1 Paludomus Sw. 



1 Hemimitra Sw. 



1 Mudalia Ilald. 



1 Anculosa (Lithasia) geniculata Ilald. East Tennessee. 



2 (Mudalia) turgida Hald. 



2 Limnea platystorua JIald. Vermont. 



2 expansa JIald. Vermont. 



2 Physa microstoma Ilald. Kentucky and Ohio. 



2 distorta Hald. Ohio. 



2 Discus Hald. = Planorbula Hald. 



2 Spirorbis Swains. = Discus. 



2 Helisoma. 



2 Segmeutina. 



Subgenera of PALUDINA. 



2 Paludina Lam. 



2 Lutella Ilald. 



2 Tulotoma Hald. 



2 Nematura Benson. 



3 Amnicola G. and //. 



Specimen number'of Ilaldeman's Monograph. — Jan. 1, 1840. 



3 i 1 Planorbis bicarinatus Say. 



6 Anculotus littorina Hald. Ilolston river, Va. 



I>R. A. A. Gould. — (Am. Journal Sci. and Art, 0. S., vol. 

 xxxviii. Date of title, April, 1840.) 



Pago. 



193 Delphinula minor Adams = Delphinoidea (Helix) corpu- 

 loides Mont. 



