99 



reflexa, (Limnaea) Say, 

 regulare, (P.) Lea, 

 Remondi, (Helix) Tryon, 

 rhombipa, (G.) Lea, 

 rhomb ica, (Io) Anth., 

 rigidum, (P.) Anth., 

 Roanense, (P.) Lea, 

 robulina, (Ang.) Anth., 

 robusta, (lo) Lea, 

 robustum, (P.) Lea, 

 robustum, (Sch.) Anth., 

 robusta, (G.) Lea, 

 Rogersii, (Anc.) Conr., 

 Romae, (G.) Lea, 

 roratum, (P.) Reeve, 

 rostellatura, (P.) Lea, 

 rota, (Ang.) Reeve, 

 Rowellii, (Amnicola) Tryon, 

 rubella, (G.) Lea, 

 rubicunda, (G.) Lea, 

 rubiginosa, (Anc.) Lea, 

 rubiginosa, (G.) Lea, 

 rubricata, (G.) Lea, 

 rudens, (G.) Reeve, 

 rufa, (G.) Lea, 

 rufescens, (G.) Lea, 

 mfula, (G.) Hald., 

 rugosa, (G.) Lea, 



15 



27,74 

 18 

 48 

 20 



25, 74 

 91 



31, 75 ! 

 21 

 22 



64, 65 

 84 



68, 72, 89 

 92 

 22 

 29 

 31 

 13 

 57 

 83 



67, 70, 89 

 47 

 58 

 47 

 58 



58, 81 

 57 

 44 



Saffordi, (G.) Lea, 53, 80 



salebrosa, (Ang.) Conr., 30, 75 



salebrosa, (Sch.) Anth., 64 



Sayi, (P.) Desh., 74 



Sayi, (P.) Ward, 23 



Sayi, (Strombus) Wood, 23 



scabrella, (G.) Anth., Reeve, 39 



scabriuscula, (G.) Brot, 39 



sculptilis, (G.) Lea, " 59 



Sellersiania, (G.) Lea, 41 [ 



eemicarinata, (G.) Say, 56, 80, 81 j 

 semicostata, (G.) Conr., 



semigradata, (G.) Reeve, 39, 79 



semigranulosa, (Ang.) Desh., 32, 75 



setacea, (Xylotrya) Tryon, 10, 18 



Shastaensis, (G.) Lea, 47 



Shastaensis, (G.) Lea, Reeve, 36 



Shelby ensis, (G.) Lea, 82 I 



Showalteriana, (Sch.) Lea, 92 I 



Showalterii, (Anc.) Lea, 66 



Showalterii, (G.) Lea, 83 



Showalterii, (L.) Lea, 32 



Showalterii, (P.) Lea, 24 



Showalterii, (Sch.) Lea, 62 



silicula, (G.) Gould, 47, 78 

 implex, (G.) Say, 49,51, 52, 53, 79, 80 



simplex, (P.) Lea, ' 29 



smaragdiaus, (Anc.) Reeve, 66 

 Smithii, (Diplothyra) Tryon, 11 



Smithsoniana, (G.) Lea, 92 



solida, (L.) Lea, 33 



solida, (St.) Lea, 34, 76 



solidula, (G.) Lea, 82 

 sordida, (G.) Lea, 55, 79, 80 



Spartenburgensis, (G.) Lea, 49 

 spams, (G.) Lea, 



sphaericum, (Sch.) A&th., 63 



Spillmanii, (G.) Lea, 48 



Spillmanii, (Io) Lea, 21 



Spiilmanii, (P.) Lea, 22, 27 



Spillmanii, (Sch.) Lea, 64 



Spillmanii, (St.) Lea, 34 



spinalis, (P.) Lea, 74 



spinella, (G.) Lea, 58 



spinosa, (Io) Lea, 20, 73 



spirostoma, (Io) Anth., 21 

 Spixiana, (Ang.) Lea, 



spurca, (G.) Lea, 54 



spurca, (P.) Lea, 75, 80 



squallida, (Anc.) Lea, 72, 90 



Stewardsoniana, (G.) Lea, 36, 71 



straminea, (G.) Lea, 85 



strenua, (G.) Lea, 39, 77 



striata, (G ) Lea, 45, 78 



striata, (Martesia) 11 



striatula, (G.) Lea, 45, 78 



striatum, (P.) Lea, 29 



strictum, (P.) Lea, 26 



strigillata, (G.) Muhlfeldt, 59 



strigosum, (P.) Lea, 28 



Stutchburyi, (Xylotrya) 11 



Stygia, (Ang.) Say, 31, 75 



suavis, (G.) Lea, 85 

 subangulata, (G.) Anth., 



subcarinata, (Anc.) Rav., 72 



subcarinata, (Anc.) Wood, 67 

 subcarinata, (G.) Anth., Reeve, 50 



subcylindracea, (G.) Lea, 46, 78 



subglobosa, (Anc.) Say, 69, 89 



subglobosa, (Ang.) Lea, 30 



subglobosa, (Pal.) Say, 72 



Bublirata, (G.) Conr., 37 



subrhombica, (G.) LejR, 92 



subrobustum, (P.) Lea, 91 

 subsolida, (G.) Lea, 55, 79, 80 



substricta, (G.) Hald., 39, 77 



substrictum, (P.) Hald , 23 



subulaeforme, (P.) Lea, 25 



subulare, (P.) Lea, 25, 74 



succinulata, (G.) Anth., 57 

 sugillatum, (P.) Reeve, 29, 74, 75 



sulcosa, (Anc.) Anth., 66 



sulcosa, (G.) Lea, 59, 81 



