6203 
6204 
6205 
6206 
6207 
6208 
6209 
6210 
6211 
6212 
6213 
6214 
6215 
6216 
6217 
6218 
6219 
6220 
6221 
6222 
6223 
6224 
6225 
6226 
6227 
6228 
6229 
6230 
6231 
6232 
6233 
affinis, 
albus, 
SS Svar; 
“ “ 
armigerus, 
bicarinatus, 
s var., 
campanulatus, 
carinatus, 
complanatus, 
sf var., 
“ iad 
‘ &e 
compressus, 
concavus, 
contortus, 
corneus, 
Sci Vial, 
cornu-arietis, 
corpulentus, 
cristatus, 
decipiens, 
deflectus, 
ss var., 
dentiferus, 
dilatatus, 
dubius, 
elevatus, 
engonatus, 
exacutus, 
fallax, 
ferrugineus, 
fontana, 
Guadaloupensis, 
Haldemani, 
hirsutus, 
hispidus, 
imbricatus, 
incertus, 
intermedius, 
lentus, 
Adams, 
Mill., 
Say, 
Say, 
Say, 
Mill., 
Linn., 
Mich., 
Anth., 
Mill., 
Drap., 
Lam., 
Say, 
Drap., 
Adams, 
Say, 
Adams, 
Gould, 
Hart., 
Adams, 
Conrad, 
Say, 
Say, 
Spix, 
Mont., 
Sowb., 
Adams, 
Gould, 
Drap., 
Mill., 
Parr., 
Charp., 
Say, 
10 
3 
13 
20 
9 
2 
22 
267 
Jamaica, 
France, 
Lyons, 
Massachusetts, 
New York, 
New York, 
Georgia, 
New York, 
France, 
Europe, 
France, 
England, 
Sicily, 
Strasbourg, 
Ohio, 
France, 
France, 
Hungary, 
China, 
Winnipeck Riv., 
France, 
Jamaica, 
Ohio, 
Vermont, 
Jamaica, 
Massachusetts, 
Italy, 
Vermont, 
Georgia, 
New York, 
Massachusetts, 
Brazil, 
England, 
West Indies, 
Jamaica, 
Massachusetts, 
France, 
France, 
Hungary, 
Rome, 
South Carolina, 
Conch. Contrib., p. 44. 
Drap. Moll., pl. 1, f. 45-48. 
Hald. Mon., pl. 4, f. 8-10. 
Gould Invert., f. 135. 
Turt. Man., p. 114, f. 97. 
Mill. Verm., p. 164, N. 350. 
Hald. Mon., pl. 4, f. 11-15. 
Hald. Mon., pl. 1, f. 1-4. 
Hald. Mon., pl. 1, f. 5-6. 
Hald. Mon., pl. 1, f. 7-11. 
Drap. Moll., pl. 2, f. 18, 14. 
Rossm., f. 59. 
Drap. Moll., pl. 2, f 11, 12. 
Mill. Verm., p. 160, N. 349. 
Turt. Man., p. 107, f. 88. 
Rossm., 1, p. 102. 
Cy Pir aps; pl. 4), fl 2: 
Planorbis hispidus, Drap. 
Helix alba, Gmel. 
Planorbis villosa, Poir. 
Planorbis albus, Turt. 
Planorbis hirsutus, Gould. 
Planorbis engonatus, Cour. 
Helix planorbis, Linn. 
Helix complanata, Linn. 
Planorbis marginatus, Drap. 
Planorbis umbilicatus, Mull. 
Helix fontana, Mont. 
Planorbis fontana, Turt. 
Planorbis rivularis, Ziegl. 
Mich. Compl., pl. 16, f. 6, 7, 8. 
Drap. Moll., pl. 1, f. 39-41. 
Drap. Moll., pl. 1, f. 42-44. 
Mill. Verm., p. 166. 
Guer. Icon., pl. 7, f. 2. 
Knorr Verg., 1, pl. 2, f. 4, 5. 
Hald. Mon., pl. 3, f. 7-9. 
Drap. Moll., pl. 2, f. 1-8. 
Conch. Contrib., p. 43. 
Long’s Exp. App., pl. 15, f. 8. 
Hald. Mon., pl. 4, f. 4-7. 
Conch. Contrib., p. 17. 
Hald. Mon., pl. 4, f. 16-18. 
Hart. G., pl. 32, f. 111. 
Jour. Bost.S. N. H.,3, pl. 3,f.15. 
New F. W. Shells, pl. 9, f. 8. 
Hald. Mon., pl. 4, f. 1-3. 
Hald. Mon., pl. 3, f. 1-3. 
Spix T. Bras., pl. 18, f. 1-2. 
Mont. T. Brit., p. 462, pl. 6, f. 6. 
Sowb. Gen., f. 2. 
Conch. Contrib., p. 43. 
Gould Invert., f. 135. 
Drap. Moll., pl. 1, f. 45, 48. 
Drap. Moll., pl. 1, f. 49-51. 
Hartm. G., p. 111, pl. 32. 
Hald. Mon., pl. 3, f. 4-6. 
is Planorbis parvus, Say. 
Planorbis similis, Mull. 
Planorbis microstoma, Ziegl. 
is Ampullaria cornu-arietis. 
Planorbis virens, Adams. 
is Planorbis intermedius, Charp. 
is Planorbis parvus, Say. 
is Planorbis bicarinatus, Say. 
is Planorbis trivolvis, Say. 
is Planorbis olivaceus, Wagn. 
is Planorbis complanatus, Linn. 
is Planorbis lugubris, Wagn, 
is Planorbis albus, Mull. 
is Planorbis albus, Mill. 
is Planorbis Nautileus, Linn. 
Planorbis dubius, Hartm. 
