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18. 
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MACTRACEA. 
Genus V. MESODESMA, Deshayes. 
. aretatum, Gould, Invert. Massachusetts, p. 57. f. 39. 
Mactra arctata, Conrad. 
. Chemnitzii, Deshayes, Reeve, Conch. Syst. v.1. pl. 45. f. 1. 
Mya australis, Gmelin; Mya Nove Zelandie, Chemnitz ; 
Mactra Australis, Dillwyn. 
.corneum, Deshayes, Anim. sans vert. v. 6. p. 133. 
Amphidesma cornea, Lamarck. 
. cuneatum, Deshayes, Anim. sans vert. v. 6. p. 133. 
Crassatella cuneata, Lam. ; Mesodesma subtriangulata, Gray 
. cycladeum, Deshayes, Anim. sans vert. v. 6. p. 133. 
Crassatella cycladea, Lamarck. 
. deauratum, Hanley, Species of Shells, p. 39. note. 
Mactra deaurata, Turton; Mactra denticulata, Wood. 
. donacillum, Deshayes, Sowerby, Genera, no. 10. f.3. 
Donax plebeia, Montagu; EHrycina plebeia, Sowerby ; 
Amphidesma donacillum, Lamarck. 
. donacitta, Deshayes, Reeve, Conch. Syst. v. 1. pl. 45. f.4. 
Mactra donacia, Lamarck. Chile 
. Erycina, Deshayes, Quoy, Voy. del’ Astrol. pl. 82. f. 12-14. 
Crassatella Erycina, Lamarck. 
. glabellum, Deshayes, Lam. Anim. s. v. 2nd edit. v.6. p. 133. 
Amphidesma glabella, Lamarck. 
. glabratum, Deshayes, Reeve, Conch. Syst. v. 1. pl. 45. f. 6. 
Crassatella glabrata, Lamarck ; Erycina complanata, Sow. 
. Jauresii, Joannis, Mag. de Zool. Moll. pl. 54. 
. planum, Hanley, Pro. Zool. Soc. 1843. 
. Quoyi, Deshayes, Enc. méth. v. 2. p. 443. 
. Solenoides (Lrycina), King, Zool. Journ. v. 4. 
. striatum, Deshayes, Enc. méth. v. 2. p. 443. pl. 254. f. 4. 
Crassatella striata, Lamarck ; Erycina striata, Sowerby ; 
Mactra striata, Linneus. 
. trigonum, Deshayes, Enc. méth. v. 2. p. 444. 
. triquetrum, Hanley, Pro. Zool. Soc. 1843. 
Genus VI. UNGULINA, Daudin. 
. oblonga, Daudin, Hist. Nat. coq. v. 3. p. 76. pl. 20. f. | and 2. 
Ungulina rubra, De Roissy. 
transversa, Lamarck, Anim. sans vert. v. 6. p. 122. 
Ungulina oblonga, var. Sowerby. 
