46 



19. S. Deshayesii, Conrad. 



Mactra Calijornica, Desliayes, Zool. Proc, 68, 1854. 

 Reeve, Conch. Icon. Monog. Mactra, f. 114, 1854. 



Gulf of Califurnia. 



20. S. Micobarica, Gmelin, Syst. Nat., 3261. 



Nicohar Islands. 



21. S. pellucida, Chemnitz, Conch. Cab., vi., 235, pi. 26, 



t. 234, 1782. 

 Keeve, Conch. Icon. Monog. Mactra, f. 118, 1854. 

 31actra depressa, Lana., An. s. Vert., vi., 108, 1835. 



Bay of Manilla 



22. S. plicatilis, Deshayes, Zooh Proc, 69, 1854. 

 Reeve, Conch. Icon. Monog. Mactra, f. 121, 1854. 



PJtihppines. 



23. S. Senegalensis, Philippi, Zeits. lUr Malak., 27, 1849. 

 Reeve, (Jonch. Icon. Monog. Mactra, f. 120, 1854. /Senegal. 



24. S. Solanderi, Gray, Mag. Nat. Hist., 373, 1837. 

 Reeve, Conch. Icon. Monog. Mactra, f. "113, 1854. 



3IolHccas. 



26. S. Thraciod.es, Adams and Reeve, Zooh Voy. Lamarang, 

 Molh, 81, ph 23, f. 8, 1848. 

 Reeve, Conch. Icon. Monog. Mactra, f. 116, 1858. 



Eastern Seas. 



Genus DARINA, Gray. 

 1. D. Solenoides, King. 



Genus SHIZOTHJEEUS, Conrad. 

 Proc. Acad. Nat. Sci. 199, 1852. 



1. S. Hnttallii {Cryptodon), Conrad, Jour. Acad. Nat. Sci. vii. 

 235, pL 18, f. 1, 1837. Sta. Barbara. 



Genus TRESUS, Gray, 1849. 



1. S. maximus {Lutraria). Middendorf, Malac. ZooLRuss. pt. 

 3, 66, pL 19, f. 1—4, 1843. 

 L. injiata, Dunker. 



Mactra maxima, Reeve, Conch. Icon. Monog. Mactra, f. 4, 

 1854. California. 



