47 



Genera undetermined. 



Genub MACTRA, Linn. 



M. amygdala, Crosse and Fischer, Jour, de Conch, iv. 8d 

 ser. o4y, 1864. Australia. 



M. aequilateralis, Deshuyes, Zool. Proc. 17, 1858. 

 Reeve, Conch. Icon. Monog. Mactra, f. 1-4, 1851. 



New Zealand. 

 M. angulifera, Deshayes, Zool. Proc. 70, 1854. Fhil/ppines. 



M. Cumingiana, Petit, Jour. Conch, iv. 359, pL 12, f. 1, 2, 



185-5. Mouth of the Gambia. River., Africa. 



M. pulchella, Philippi, Abbild. ii. 71, pi. 2, f. 3, 1845. 



China. 



