98 CLASS III. GASTEROPODA. ORDER VI. PULMOBRANCHIATA. 
Pl. CLXXXIII. Fig. 7. 
CyCLOSTOMA ACUTIMARGINATUM, Sowerby, Proceedings Zool. Soc., 1842. 
Pl. CLXXXIII. Fig. 8. 
CycLtostoma amBicua, Lamarck, Anim. sans vert., new edit., vol. vii. 
p. 357. Delessert, Recueil de Coquilles, pl. 29. f. 5. a, b, ¢. 
Pl. CLXXXIII. Fig. 9. 
CycLosroMa pyrostoma, Sowerby, Species Conchyliorum, Part 2. f. 227 
and 228. 
Pl. CLXXXIII. Fig. 10. 
CycLosroma TIGRINUM, Sowerby, Species Conchyliorum, Part 2. f. 221 
and 222. 
Pl. CLXXXIV. Fig 11. 
CycLostoma ocutus-capri, Gray, MSS. British Museum. 
Pl. CLXXXIV. Fig. 12. 
CycLostroma puLtcuruM, Gray, MSS. British Museum. Wood, Index 
Testaceologicus, Suppl., pl. 6. f.4. Sowerby, Genera of Shells, 
No. 35. f. 2; Species Conchyliorum, Part 2. f. 134 and 135. 
Pl. CLXXXIV. Fig. 13. 
Cyctosroma Harveranum, Sowerby, Species Conchyliorum, Part 2. 
it PANO) 
Pl. CLXXXIV. Fig. 14 and 24. 
Cyctostoma Cuviertanum, Petit, Revue Zoologique, 1841, p. 184. 
Pl. CLXXXIV. Fig. 15. 
Cyctostoma Petivertanum, Gray, MSS. British Museum. Wood, In- 
dex Testaceologicus, Suppl., pl. 6. f. 2. Sowerby, Species Conchy- 
liorum, f. 97 and 98. 
