Balanus tintinnabulum north and south of the equator (1 to 5). psittacus* south. vinaceus* " trigonus north and south (4 and 5). lævis* " concavus " (4 and 5). pœcilus* south. improvisus south (and north?) (1). nubilus* north. glandula north, and Southern Pacific Ocean. cariosus* north. Tetraclita porosa north and south (4 and 5 and W. Indies). Elminius Kingii* south. Chthamalus stellatus north. cirratus* south. scabrosus* " fissus* north and south. Hembeli* north. Verruca lævigata* south. Pollicipes elegans* south and north. polymerus* " Cryptophialus minutus* south. Here we have on this long line of coast, 22 species, of which 15 are peculiar. (4.) THIRD PROVINCE: _Indian Archipelago (including the Philippines, Malacca, Borneo, Sumatra, Java, and New Guinea, and eastern coast of India)._ Balanus tintinnabulum (1 to 5). Ajax* navicula* stultus and West Indies. trigonus (3 and 5). concavus (3 and 5). amphitrite (1 to 5). patellaris* amaryllis (5). quadrivittatus* Acasta lævigata and Red Sea. fenestrata* purpurata* sporillus* Tetraclita porosa (3 and 5) and West Indies. costata* vitiata (5). cœrulescens Pacific Ocean. radiata (5) and West Indies. Pyrgoma cancellatum* grande* milleporæ* crenatum* monticulariæ* Creusia spinulosa and West Indies. Chthamalus stellatus (1 and 3). intertextus* Chamæsipho scutelliformis* Octomeris brunnea Pœcilasma fissa* eburnea* Dichelaspis Warwickii* Ibla Cumingii* Scalpellum rostratum* Pollicipes mitella* Lithotrya Nicobarica* truncata and Pacific Ocean. Here we have 37 species, of which 24 are peculiar to this province. (5.) FOURTH PROVINCE: _Australia (including New Zealand)._