INDEX. 



Synonyms, and the names of such proposed species as have not 

 yet been recognised from the characters indicated, are printed in 

 italics. 



Acella, p. 14. . . LIMNEA, p. 6 



Amphipeplea, . : "3, 14 



Ancylus crassus, ... 14 



depressus, ... 6 



diaphanus, ... 8 



filosus, .... 10 



fuscus 12 



obscurus, .... 9 

 parallelus, ... 11 

 rivularis, .... 4 

 tardus, .... 7 



Aplexa, 14,37 



Buccinum,) . . . LIMNEA, 1 

 Bulimnea, . . . . " 6 

 Bulimus, .... PHYSA, 23 



Bulinus, " 23 



Bulla crassula, Dillw. " 23 



fontinalis, Chemn. " 23, 29 



Jluviatilis, PLANORBIS, 13 



hypnorum, . PHYSA, 36 



Crepidula, . . ANCYLUS, 1 



Diastropha, 14 



Helix, LIMNEA, 1 



angulatus, PLANORBIS, 6 



Leptolimnea, . . . LIMNEA, 1 



Limnea, .... PHYSA, 1 



Limnea acuminata, ... 38 



apicina, .... 37 



appressa, .... 18 



attenuata, ... 28 



bulimoides, ... 44 



caperata, .... 34 



catascopium, . 6, 52 



Limnea casta, Proc. Am. P. 



S.ii. ..... 33 



coarctata, .... 39 



colurnella, ... 38 



chalybea, .... " 



curta, Proc. Am. P. 



S.ii 33 



decollata, .... 52 



desidiosa, .... 31 



desidiosa, .... 48 



dutortus, .... 26 



elodes, 20 



emarginata, ... 10 

 exigua, Proc. Am. P. 



S. ii.' 

 exilis, . . 

 expansa, . 

 ferruginea, 

 fragilis, 



33 

 26 

 29 

 49 

 20,23 



fusiformis, Proc. Am. 



P. S.ii 33 



galbana, .... 51 

 gracilis, .... 50 

 grijjithiana, Proc. Am. 



P. S. ii 33 



heterostropha, PHYSA, 23 



humilis, 



jugularis, . . . . 



kirtlandiana, Proc. 



Am. P. S. ii. . . 



macro stoma. , 



41 

 16 



33 

 38 

 13 

 41 



