PLATE LIII. 
PAGE 
Pigs. 1, 2. SCALA SAYAXA Dall 212 
1. Ventral view. St. Mary's River. 
2. Ventral view. Greensboro. 
Pig. 3. SCALA MARTLANDICA n. Sp 213 
3. Ventral view. Jones Wharf. 
Fig. 4. ScALA (Opalia) calveetensis n. sp 213 
4. Ventral view. Plum Point. U. S. National Museum. 
Fig. 5. Scala (Opalia) eeticl'lata n. sp 214 
5. Ventral view. Plum Point. 
Fig. 6. Scala (Opalia) prunicola n. sp 214 
6. Ventral view. Plum Point. 
Fig. 7. Scala ( Sthexorhytis) expaxsa Conrad 215 
7. Ventral view. Jones Wharf. Wagner Free Institute of Science. 
Pig. 8. Scala (Sthenorhytis) pachypleuba Conrad 215 
8. Ventral view. Plum Point. 
Figs. 9, 10. BuLiMA ebobea Conrad 216 
9 Ventral view. St. Mary's River. 
10. Ventral view of another specimen. Same locality. 
Pig. 11. EuLiMA L.s:viGATA (H. C. Lea) 217 
11. Ventral view. St. Mary's River. 
Fig. 12. EuLiMA MioBANS Courad 217 
12. Ventral view. Cove Point. 
Fig. 13. Niso LiNEATA Courad 218 
13. Ventral view. Plum Point. 
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