EXPLANATION OF PLATE XXVIII. 
Figure]. Pisi1pruM ABDITUM Hald. Prime, Monog., fig. 72. Enlarged. 
“2, PISIDIUM VIRGINICUM Bourg. Prime, Monog., fig. 61. 
Enlarged. 
«3. Limax MAXIMUS Linné. Shell. Tryon, Mon. Terr. Moll.,. 
pl. xvi, fig. 2. 
4, CIRCINARIA CONCAVA Say. 
5. VITREA DRAPARNALDI Beck. 
“ 6. GASTRODONTA DEMISSA Binney. 
7. PISIDIUM COMPRESSUM Prime. Monog,, fig. 67. Enlarged. 
8. LIMAX MAXIMUS Linné. Tryon, Mon. Terr. Moll., pl. xvi, 
fig. 2. : 
‘9, ZONITOIDES ARBOREUS Say. Binney, Man. Am. Land Sh., 
fig. 15. Enlarged. : 
“ 10. VITREA HAMMONIS Strom. Binney, Man. Am. Land Sh., 
fig. 21. Enlarged. 
“ 11. ViITREA INDENTATA Say. Binney, Man. Am. Land Sh., 
fig. 15. Enlarged. 
“12. ZONITOIDES MINUSCULUS Binney. Binney, Man. Am. Land 
Sh., fig. 18. Enlarged. 
“ 18. AGRIOLIMAX CAMPESTRIS Binney. Tryon, Mon. Terr: 
Moll., pl. xvii, figs. 12, 18. 
“ 14. GASTRODONTA LIGERA Say. 
“ 15. OMPHALINA FULIGINOSA Griff. 
“ 16 ZONITOIDES NITIDUS Miller. Binney, Mon. Am. Land Sh., 
fig. 12. Enlarged. 
“ 17. EucoNULUS FULVUS Drap. Binney, Mon. Am. Land Sh., 
fig. 26. Enlarged. 
“ 18. PyRAMIDULA STRIATELLA Anth. Binney, Mon. Am. Land 
Sh., fig. 28. Enlarged. 
“ 19. PyRAMIDULA ALTERNATA Say. Juvenile. 
“ 20. PUNCTUM PYGM#uUM Drap. Binn., Man. Am. Land Sh., 
fig. 31. Enlarged. 
“« 21, PyRAMIDULA ALTERNATA Say. Albino. 
“ 22. PYRAMIDULA ALTERNATA Say. Eggs. 
“ 23. PYRAMIDULA ALTERNATA Say. Variation in height of spire. 
“ 24. PyRAMIDULA ALTERNATA Say. 
“ 25. PyRAMIDULA LINEATA Say. Binney, Man. Am. Land Sh., 
fig. 37. Enlarged. 
“26. VALLONIA PULCHELLA Miiller. Binney, Man. Am, Land 7 
Sh., fig. 39. Enlarged. ; . 
“ 27. LiMAX FLAVuS Linné. Tryon, Mon. Terr. Moll., pl. xvi, nim 
fig. 3. , 
All natural diameter, except where otherwise mentioned. 
