INDEX 



The superior figures tell the exact place on the page in ninths; e. g 26* 

 means page 26 beginning in the third ninth of the page, i. e. about one third 

 of the way down. 



Acanthinula, 34*. 



harpa, 34*. 

 Acella gracilis, 56*. 

 Achatina lubrica, 44*. 

 Aclis, I3\ 



striata, 13*. 

 Acmaea, 25*. 



testudinalis, 25*. 



alveus, 25*. 

 Acmaeinae, 25*. 

 Actaeon, 26". 



punctostriata, 26*. 

 Aeolidae, 27". 

 Aeolinae, 27*. 

 Aeolis, 27 2 . 



salmonacea, 27*. 

 Agriolimax, 48 T . 



agrestis, 48 T . 



campestris, 49*. 

 Alasmidonta, po 8 . 



calceola, pi 2 . 



heterodon, 91*. 



marginata, 91*. 



truncata, 91*. 



undulata, 90 8 , 91*. 

 Alasmodon arcuata, 92 1 . 



corrugata, 91*. 



marginata, 91. 



rugosa, 90. 



undulata, 90 s . 



Alasmodonta benedictensis, 88 2 . 

 Alexia, 51*. 



myosotis, 51". 

 Amnicola, 20 1 . 



cincinnatiensis, 20", 21*. 



granua, 21*. 



granum, 21. 



letsoni, 2i 7 . 



Amnicola limosa, 20*. 

 lustrica, 2i 4 . 

 orbiculata, 2i 2 . 

 pallida, 20 2 . 

 porata, 20*. 

 sayana, 2O 1 . 

 Anatina, 67*. 



papyracea, 67*. 

 Anatinidae, 66 s . 

 Anculosa carinata, iS 8 . 



dissimilis, i8 5 . 

 Anculotus carinatus, 18*. 



trivittatus, 18*. 

 Ancylinae, 62. 

 Ancylosa, i8 4 . 

 carinata, i8 4 . 

 Ancylus, 62. 

 borealis, 63. 

 calcarius, 63 4 . 

 fuscus, 62'. 

 . parallelus, 62*. 

 rivularis, 63 1 . 

 tardus, 63*. 



Anguispira alternata, 33". 

 Angulus tenella,. see Tellina (An- 



gulus) tenella. 

 tenera, see Tellina (Angulus) 



tenera. 

 versicolor, see Tellina (Angulus) 



versicolor. 



Anodon benedictensis 88 2 . 

 edentula, 85*. 

 ferussaciana, 88 8 . 

 fluviatilis, 86 2 . 

 pavonia, 85 T . 

 plana, 87". 

 subcylindracea, 8g 2 . 

 unadilla, 8s 5 . 



