FAMILY 2. SEMIPHYLLIDIANA. 49 
pl. 146. f. 1354 and 1355. Cuvier, Ann. du Mus., vol. i. p. 12. 
f. 1 to 6. 
Bullea aperta, Lamarck. 
Scaphander aperta, De Montford. 
Lobaria quadriloba, Gmelin. 
Amygdala marina, Plancus. 
Pl. CLIII. Fig. 4. 
Buia caLycutata, Sowerby, Genera of Shells, No. 39. f. 5. 
Bulla viridis, Rang. Quoy and Gaimard, 
Pl. CLIIL. Fig. 5. 
Butta tienaria, Linneus, Syst. Nat., p. 1184. Martini, Conch., vol. i. 
pl. 21. f.194 and 195. Enc. Méth., pl. 359. f. 3. a, b. 
Pl. CLI. Fig. 6. 
Buia scasra. Chemnitz, Conch., vol. x. p.118. pl. 146. f. 1352 and 
1353. Deshayes, new edit. of Lamarck, vol. vii. p. 677. 
Bullina scabra, De Férussac. 
Pl. CLI. Fig. 7 and 8. 
Butta avsocineta, Van der Hoeven, Leyden Journ. Nat. Hist., D. V1. 
St. 4. p. 245. pl. 10. 
Family 2. SEMIPHYLLIDIANA. 
Testa planulata, cornea aut calcarea, vel externa vel interna, dorso affixa. 
The Cyclobranchiate Gasteropoda, which include the genera Chiton, 
Chitonellus and Patella, were associated by Lamarck under the title of 
‘« Les Phyllidiens,” because of the branchie being arranged in a circle 
round the edge of the mantle. Now, in the animals which come under 
VOL. II. H 
