16 MACTHACEA. 



Genus V. MESODESMA, Deshayes. 



1. M. arctatum, Gould, Invert. Massachusetts, p. 57. f. 39. 



Mactra arctata, Conrad. 



2. M. Chemnitzii, Deshayes, Reeve, Conch. Syst. v. l.pl.4<5. f. 1. 



Mya australis, Gmelin; Mya Novae Zelandice, Chemnitz ; 

 Mactra Australis, Dillwyn. 



3. M. corneum, Deshayes, Anim. sans vert. v. 6. p. 133. 



Amphidesma cornea, Lamarck. 



4. M. cuneatum, Deshayes, Anim. sans vert. v. 6. p. 133. 



Crassatella cuneata, Lam. ; Mesodesma subtriangulata, Gray 



5. M. cycladeum, Deshayes, Anim. sans vert. v. 6. p. 133. 



Crassatella cycladea, Lamarck. 



6. M. deauratum, Hanley, Species of Shells, p. 39. note. 



Mactra deaurata, Turton ; Mactra denticulata. Wood. 



7. M. donacillum, Deshayes, Sowerby, Genera, no. 10. f. 3. 



Donax plebeia, Montagu ; Erycina plebeia, Sowerby ; 

 Amphidesma donacillum, Lamarck. 



8. M. donacium, Deshayes, Reeve, Conch. Syst. v. l,pl.45. f. 4. 



Mactra donacia, Lamarck. 



9. M. Erycina, Deshayes, Quoy, Voy. de 1' Astrol. pi. 82. f. 12-14. . 



Crassatella Erycina, Lamarck. 



10. M. glabellum, Deshayes, Lam. Anim. s. v. 2nd edit. v. 6. p. 133. 



Amphidesma glabella, Lamarck. 



1 1. M. glabratum, Deshayes, Reeve, Conch. Syst. v. 1. pi. 45. f. 6. 



Crassatella glahrata, Lamarck ; Erycina complanata. Sow. 



12. M. Jauresii, Joannis, Mag. de Zool. Moll. pi. 54. 



13. M. planum, Hanley, Pro. Zool. Soc. 1843. )i. 107.. 



14. M. Quoyi, Deshayes, Enc. meth. v. 2. p. 443. 



15. M. Solenoides {Erycina), King, Zool. Journ. v. 4. 



16. M. striatum, Deshayes, Enc. meth. v. 2. p. 443. pi. 254. f. 4. 



Crassatella striata, Lamarck ; Erycina striata, Sowerby ; 

 Mactra striata, Linnaeus. 



17. M. trigonum, Deshayes, Enc. meth. v. 2. p. 444. 



18. M. triquetrum, Hanley, Pro. Zool. Soc. 1843. (j.iol- 



Genus VL UNGULINA, Daudin. 



1. U. oblonga, Daudin, Hist. Nat. coq. v. 3. p. 76. pi. 20. f. I and 2. 



Ungulina rubra, De Roissy. 



2. U. transversa, Lamarck, Anim. sans vert. v. 6. p. 122. 



Ungtdina oblonga, var. Sowerby. 



