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 7 . 



harpa, 34 ? - 

 Acella gracilis, 56 7 . 

 Achatina lubrica, 44*. 

 Aclis, 13 1 . 



striata, 13 1 . 

 Acmaea, 25*. 



testudinalis, 25*. 

 alveus, 25*. 

 Acmaeinae, 25*. 

 Actaeon, 26 s . 



punctostriata, 26 s . 

 Aeolidae, 27*. 

 Aeolinae, 27*. 

 Aeolis, 27 2 . 



salmonacea, 27'. 

 Agriolimax, 48 7 . 



agrestis, 48 7 . 



campestris, 49 1 . 

 Alasmidonta, 90 8 . 



calceola, gi 2 . 



heterodon, 91 s . 



marginata, 91*. 



truncata, 91 8 . 



undulata, 90 8 , 91 1 . 

 Alasmodon arcuata, 92 1 . 



corrugata, 91 6 . 



marginata, 91". 



rugosa, 90 5 . 



undulata, 90 8 . 

 Alasmodonta benedictensis, 88 2 . 

 Alexia, 51 2 . 



myosotis, 51 8 . 

 Amnicola, 20 1 . 



cincinnatiensis, 20 9 , 2l\ 



granua, 21*. 



granum, 21 9 . 



letsoni, 21 7 . 



Amnicola limosa, 20 4 . 



lustrica, 21 4 . 



orbiculata, 21 2 . 



pallida, 20 2 . 



porata, 20 4 . 



sayana, 20 1 . 

 Anatina, 67 1 . 



papyracea, 67*. 

 Anatinidae, 66 3 . 

 Anculosa carinata, 18 8 . 



dissimilis, 18 5 . 

 Anculotus carinatus, i8\ 



trivittatus, 18*. 

 Ancylinae, 62 s . 

 Ancylosa, 18*. 



carinata, 18 4 . 

 Ancylus, 62°. 



borealis, 63 s . 



calcarius, 63*. 



fuscus, 62 s . 



parallelus, 62 s . 



rivularis, 63 1 . 



tardus, 63 s . 

 Anguispira alternata, 33 s . 

 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 s . 

 fluviatilis, 86 2 . 

 pavonia, 85 7 . 

 plana, 87 s . 

 subcylindracea, Sg 2 . 

 unadilla, 85 s . 



