6 

 SUB-GENUS TRIBULUS (KLEIN) 



53. Purpura planospira (Lam.), Gallapagos Isles, Lower 

 California. 



56. Purpura aperta (Blainv.), W. C. of Central America, 

 Sandwich Isles. 



SUB-GENUS THALESSA (H. & A. AD.) 



76. Purpura hippocastaneum (Lam.), Zanzibar, Indian 

 Ocean, Philippines, Cent. Pac., Paumotus. 



77. Purpura turnulosa (Reeve), Zanzibar? Japan. 



78. Purpura pica (Blainv.), China Sea, Philippines, Cen- 

 tral Pacific Ocean. 



79. Purpura armigera (Chemn.), Philippines, Panmotus, 

 etc. 



80. Purpura deltoidea (Lam.), West Indies, Florida. 



54. Purpura melones (Duclos), Pacific Coast of Central 

 America. 



55. Purpura mancinella (Linn.), Japan, Singepore, Aus- 

 tralia, Fiji Is., W. C. of Central America, Peru. 



57. Purpura neritoidea (Linn.), Cape Verde Is., As- 

 cension Is. 



58. Purpura bufo (Lam.), Philippines. 



SUB-GENUS STRAMON1TA (SCHUM) 



59. Purpura Consul (Lam.), Philippines. 



60. Purpura haemastoma (Linn.), Mediterranean Sea, W. 

 C. of Africa, W. I., W. C. of Mexico. 



61. Purpura haemastoma. Form, Undata (Lam.), West 

 Indies, W. C. of America, East Indies. 



63. Purpura haemastoma. Form, Bicostalis (Lam.), 

 East Indies, West Columbia. 



SUB-GENUS TROCHIA (SWAINS) 

 Si. Purpura cingulata (Linn.), Cape of Good Hope. 



62. Purpura succincta (Martyn), Australia, New Zealand, 

 C. of G. H. 



SUB-GENUS POLYTROPA (SWAINSON) 



48. Purpura lapillus. Form, crispata, (Linn.) (Chemn.), 

 Boreal Seas, 



GENUS JOPAS (H. & A. AD. 



64. Jopas sertum (Brug.). Red Sea to Paumotus Is. 



