EXPLANATION OF PLATE XXX. 
Figurel. PHILOMYCUS CAROLINENSIS Binney. Tryon, Mon. Terr. 
Moll., pl. xvi, fig. 6. 
2. POLYGYRA MULTILINEATA Say. 
3. PoLYGYRA MONODON FRATERNA Say. 
4. POLYGYRA MONODON Rackett. 
«5, POLYGYRA INFLECTA Say. 
6. POLYGYRA TRIDENTATA Say 
7. POLYGYRA FRAUDULENTA Pilsbry. 
8. BIFIDARIA CONTRACTA Say. Tryon, Mon. Terr. Moll. pl. 
xv, fig. 16. Enlarged. 
“ 9, PUPOIDES MARGINATUS Say. Tryon, Mon. Terr. Moll., pl. 
xv, fig. 10. Enlarged. 
“ 10, BIFIDARIA CORTICARIA Say. Tryon, Mon. Terr. Moll., pl. 
xv, fig. 18. Enlarged. 
“11. BIFIDARIA PROCERA Gould. Tryon, Mon. Terr. Moll., pl. 
xv, fig. 17. Enlarged. 
“ 12. BIFIDARIA PENTODON Say. Tryon, Mon. Terr. Moll., pl. xv, 
fig. 5. Enlarged. 
“13. VERTIGO OVATA Say. Tryon, Mon. Terr. Moll., pl. xv, fig. 
22. Enlarged. 
“ 14, STROBILOPS LABYRINTHICA Say. Binney, Man. Am. Land 
Sh., fig. 150. Enlarged. 
“ 15, BIFIDARIA ARMIFERA Say. Tryon, Mon., Terr. Moll., pl. 
xv, fig. 15. Enlarged. 
“ 16. VERTIGO MILIUM Gould. Tryon, Mon. Terr. Moll., pl. xv, 
fig. 21. Enlarged. 
“ 17. COCHLICOPA LUBRICA Miiller. Tryon, Mon. Terr. Moll., 
pl. xiv, fig. 14. Enlarged. 
“ 18. LIMNAA CAPERATA Say. 
“ 19, LIMNA&A CAPERATA UMBILICATA Adams. 
« 20. LIMNZA DESIDIOSA Say. 
“ 21, LIMN4&A HUMILIS Say. Haldeman, Mon., pl. xiii, figs. 4, 5. 
A little enlarged. 
« 22. SUCCINEA OVALIS Say. e 
« 23. SUCCINEA OVALIS near TOTTENIANA Lea, 
« 24. SUCCINEA RETUSA Lea. 
« 25. SUCCINEA AVARA Say. 
« 26. LIMN4A COLUMELLA Say. 
“ 27. LIMNZA CATASCOPIUM PINGUIS Say. 
« 28. PLANORBIS TRUNCATUS Miles. 
“ 29. ANCYLUS RIVULARIS Say. Haldeman, Mon., pl.i, fig.1. En- 
larged. 
“ 30. ANCYLUS TARDUS Say. Haldeman, Mon., pl.i, fig. 3. En- 
larged. Outline figures are lateral views. 
“31. VALVATA SINCERA Say. Haldeman, Mon., pl. i, figs. 7,8. 
“ 82. SEGMENTINA ARMIGERA Say. Haldeman, Mon., pl. iv, figs. 
12, 18, 
“ 38. POMATIOPSIS LAPIDARIA Say. Haldeman, Mon., pl. i, fig. 10. 
“ 34. BYTHINIA TENTACULATA Linné. 
“ 35. AMNICOLA LIMOSA Say. 
- All figures natural diameter except where otherwise mentioned. 
