PLATE XXXVIII 
Fig. 23, 24. BULLA lignaria. 
Bulla lignaria. Lam. Sysl. vi. partie 2, p. 33. 
Bulla lignaria, Mont. Test. Brit. p. 205 — Brown in Ency. Brit. vi. p. 433 — Don. Brit. Sh. pi. 27- 
Fig. 29, 30. BULLA hydatis. 
Bulla hydatis. Lam. St/st. vi. partie 2, p. 35. — Mont. Test. Brit. p. 217- — Don. Brit. Sk. pi. 88. 
Fig. 15, 16. BULLA producta. 
Bulla producta. Brown's MSS — A new species. Found at Dunbar by General Bingham. — In his Cabinet. 
Fig. 41, 42. BULLA striata. 
Bulla striata, Brown's MSS. — A new species. Found at Greenock by Stewart Ker, Esq — In his Cabinet. 
Fig. 25, 26. BULLA denticulata. 
Bulla denticulata, Mont. Test. Brit. p. 217 — Adams in Linn. Trans, v. pi. 1, fig. 3, 4, 5. 
Fig. 21, 22. BULLA emarginata. 
Bulla emarginata, Mont. Test. Brit. p. 216 — Adams in Linn. Trans, v. pi. 1, fig. 9, 10, 11. 
Fig. 31, 32. AKERA FLEXTLis. 
Akera flexiiis. Brown's MSS. 
Bulla Akera, Lam. Syst. vi. partie 2, p. 36 — Mont. Test. Brit. p. 219. 
Bulla resiliens, Don. Brit. Sh. pi. 79- 
Fig. 33, 34. BULLOSA catina. 
BuLL^A catina. Brown's MSS. 
BuUa catina, Mont. Test. Brit. p. 215. pi. 7, fig. 7 — Brown in Ency. Brit. vi. p. 434. 
Fig. 7, 8. DIAPHANA minuta. 
DiAFHANA minuta, Brown's MSS — A new species. Found at Dunbar by General Bingham. — In his Cabinet. 
Fig. 10, 11. DIAPHANA pellucida. 
DiAPHANA pelludida, Brown's MSS. — A new shell. Found at Dunbar by General Bingham. — In his Cabinet. 
Fig. 13, 14. DIAPHANA Candida. 
DiAPHANA Candida, Brown's MSS — A new species. Found at Dunbar by General Bingham. — In his Cabinet. 
Fig, 1, 2. RETUSA plicata. 
Retusa plicata. Brown's MSS. — A new species. Found at Dunbar, by General Bingham — In his Cabinet. 
Fig. 3, 4. RETUSA discors. 
Retusa discors, Brown's MSS. — A new species. Found at Dunbar by General Bingham. — In his Cabinet, 
Fig. 5, 6. RETUSA obtusa. 
Retusa obtusa. Brown's MSS. 
Bulla obtusa, Mont. Test. Brit. p. 223, pi. 1, fig. 3 — Brown in Ency. Brit. vi. p. 434. 
