103 



52. M. Obliqua, Sowerby, Conch. Icon. Sp. 226, 1867. 



Hah.—f 



53. M. obliquaria, Desh., Zool. Proc. 356, 1854. 



Pacific Ocean. 



54. M. obtusa, Sowerby, Conch. Icon. Sp. 271, 1868. 



St. Thomas. 



55. M. OCCidentalis, Morch, Conch. Icon. Sp. 118, 1867. 



West Indies. 



56. M. opalina, Sowerby, Conch. Icon. Sp. 258, 1868. 



Hah.—? 



57. M. Parkeri, Tryon. 



T. suhtrigona, Sowerby, {preoc.) Conch. Icon. Sp. 259, 1867. 



Sab.—? 



58. M. Peasei, Carpenter, Report Conch. Icon. Sp. 288, 1868. 



Panama. 



59. M. Pedroana, Conrad, Pac. R. R. Rept. v, 323, t. 3, f. 



17. California. 



60. M. pellucida, Phil. Abbild. Pt. 3, t. 5, f. 4, 1843. 



Thes. i, 326, t. 59, f. 118. Manilla. 



61. M. plena, Sowerby, Conch. Icon. Sp. 303, 1868. Hah.—? 



62. M. plebeia, Hanl(?y, Zool. Proc. 147, 1844. 



Thes. i, 296, t. 59, f. 129. Real Leijos. 



63. M. semifossils, Sowerby, Conch. Icon. Sp. 236, 1867. 



Port Jackson, Australia. 



63a. M. rotundata, Sowerby, Conch. Icon. Sp. 146, 1867. 



Hah.—? 



64. M. simplex, Sowerby, Conch. Icon. Sp. 240, 1867. 



Hah.—? 



65. M. semiplana, Sowerby, Conch. Icon. Sp. 222, 1867. 



Neiv South Wales. 



66. M. siliqua, C. B. Ad., Panama Shells 284, 1852. 



Panama. 



67. M. subelliptica, Sowb., Conch. Icon. Tellina, Sp. 220. 

 Conch. Icon. Sp. 220. Port Jackson, Australia. 



68. M. SUCCinea, Sowerby, Conch. Icon. Sp. 322, 1868. 



Manilla, 



69. M. subtrigona, Sowerby, Conch. Icon. Sp. 9, 1866. 



Hah.—? 



70. M. sublenticularls, Sowerby, Conch. Icon. Sp. 255, 



1867. Australia. 



71. M. Suensoni, Morch, Deshayes, Zool. Proc. 358, 1854. 



Brazil. 



