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ZZ AZAZARAAAAA A2zzAwz 
ARCACEA,. 
gibbosa, Sowerby, Pro. Zool. Soc. 1832; Conch. Illus. f. 9. 
glacialis, Gray, Wood's Ind. Test. suppl. pl. 2. f. 6. 
levis, Say, Amer. Conch. pl. 12. 
lanceolata, Lamarck, Sowerby, Conch. Illus. f. 1. 
lata, Hinds, Pro. Zool. Soc. 1844. 
limatula, Say, Amer. Conch. pl. 12. 
lyrata, Hinds, Pro. Zool. Soc. 1844. 
margaritacea, Lamarck, Sowerby, Genera, no. 17. f. 7. 
Arca nucleus, Linneeus; Arca margaritacea, Bruguiére. 
marmorea, Hinds, Pro. Zool. Soc. 1844. 
Mauritiana, Sowerby, Conch. Illus. f. 17. 
minuta (Arca), Montagu, Test. Brit. p. 144; Genera, f. 5. 
Arca cordata, Donovan ; Arca tenuisulcata, Courthouy. 
mitralis, Hinds, Pro. Zool. Soc. 1844. 
myalis, Courthouy, Boston Journ. Nat. Hist. v. 2. pl. 3. 
aye 
nana, Hinds, Pro. Zool. Soc. 184-4. 
nasuta, Sowerby, Conch. Illus. no. 17. f.12. 
navicularis, Cowrthouy, Boston Journ. N. H. v.12. pl. 4. f. 4. 
Nicobarica, Zamarck, Sowerby, Conch. Illus. f. 4. 
Arca Nicobarica, Bruguiére; Arca pellucida, Gmelin; 
Arca levigata, Dillwyn. 
nitida, Sowerby, Conch. Illus. f. 21. 
obliqua, Lamarck, Conch. Illus. f. 21. 
parva, Sowerby, Conch. Illus. f. 7. 
Patagonica, D’ Orbigny, Voy. dans I’ Amér. mérid. 
pella, Lamarck, Sowerby, Conch. Illus. f. 6. 
Arca pella, Linneeus; Nucula striata? Philippi. 
pisum, Sowerby, Pro. Zool. Soc. 1832; Conch. Illus. f. 23. 
polita, Sowerby, Pro. Zool. Soc. 1832; Conch. Illus. f. 1}. 
proxima, Say, Journ. A. N.S. Phil. v. 2. p. 270. 
puellata, Hinds, Pro. Zool. Soc. 1844. 
pulchra, Hinds, Pro. Zool. Soc. 1844. 
- recta, Hinds, Pro. Zool. Soc. 1844. 
reeurva, Conrad, Journ. A.N. S. Phil. v.6. pl. 11. f. 21. 
reticulata, Hinds, Pro. Zool. Soc. 184:4. 
retusa, Hinds, Pro. Zool. Soc. 1844. 
rostrata, Turton, Brit. Biv. p. 178. 
Arca rostrata, Montagu. 
rugulosa, Sowerby, Conch. Illus. f. 19. 
sapotilla, Gould, Invert. Mass. p. 100. f. 61. 
