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SEMIPHYLLIDIANA. 
Famiry I]. SEMIPHYLLIDIANA. 
Genus I. PLEUROBRANCHUS, Cuvier. 
. citrinus, Ruppel, Voy. Afric, p. 18. pl. 5. f. 2. 
- cornutus, Quoy, Voy. de lAstr. v. 2. pl. 22. f. 20-24. 
. Forskiilii, Delle Chiage, Mem. Aplys. v. 3. pl. 41. f. 11. 
- mamillatus, Quoy, Voy. de l’Astr. v. 2. pl. 22. f. 1-6. 
. membranaceus, Fleming ; Sowerby, Genera, no. 35. 
. Patagonicus, D’ Orbigny, Voy. Amer. mérid. pl. 17.£ 4, 6: 
. Peroni, Cuvier, Ann. du Mus. v. 5. p. 269. pl. 18, f. 1, 2. 
. punctatus, Quoy, Voy. de l’Astr. v. 2. pl. 22. f. 15-19. 
. reticulatus, Rang, Guerin’s Mag. de Zool. pl. 1. 
. tuberculatus, Delle Chiage, Mem. Aplys. v. 3. pl. 40. f. 1. 
Rr Eo rd ders roetdard rd 
Genus II. UMBRELLA, Lamarck. 
. U. Indica, Lamarck, Chemnitz, Conch. v.10. pl. 169. f. 1645, 1646. 
Patella umbellata, Gmelin. 
. U. Lamarkiana, Récluz, Guerin’s Mag. de Zool. 1843. p. 109. 
. U. Mediterranea, Lamarck, Anim. sans vert. v. 7. p. 574. 
Famity Ill. APLYSIANA. 
Genus I. APLYSIA, Zinneus. 
A. alba, Cuvier, Ann. du Mus. v. 38. p. 295. plod. £6. 
. Braziliana, Rang, Hist. nat. Aplys. p. 55. pl. 8. f. 1-3. 
. Brongniartii, Blainviile, Malacologie, p. 472. 
- Brugnatellii, Vand. and Robb., Guerin’s Mag. de Zool. p. 77. 
. camelus, Cuvier, Ann. du Mus. v. 2. p. 295. pe Yel. 
A. concava, Sowerby, Genera of Shells, no. 39. 
. dactylomella, Rang, Hist. nat. Aplys. p. 56. pl. 9. 
. depilans, Linneus, Syst. nat. p. 1082. no. 1. 
. fasciata, Potret, Voy. en Barbarie, v. 2. p. 2. 
. Ferussaci, Rang, Hist. nat. Aplys. pl. 19. f. 6-9. 
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