43. 
44. 
15. 
16. 
47, 
48. 
49. 
20. 
24. 
22." 
23. 
24. 
25. 
26, 
Cyclostoma mumia. 
elegans. 
Paludina fasciata (Helix vivipara, Lin.) 
Delphinula. 
Vermetus; Adans. 
Euomphalus pentangulatus, 
aes catillus, 
}Sowerby. 
Nerita Malaccensis, and its operculum. 
Neritina zebra. 
Valvata spirorbis, Drap. 
Clithon coronata. 
Natica. 
Monodonta. 
Tanthina fragilis. 
