166 BALANIDiE. 



represent species found on its eastern coast, and in Europe; 

 thus, Balanus glandula takes the places of B. crenatus, 

 and B. cariosus that of B. balanoides. Not a single species, 

 excepting a few which are also widely distributed over 

 other parts of the world, is known to be common to the 

 east and west coasts of the two Americas. 



The third province is that of the East Indian Archipelago, 

 and includes the Philippines, Borneo, New Guinea, Sumatra, 

 Java, Malacca, and the eastern coast of India. Here we 

 find 37 species, of which 24 are peculiar. I may remark, 

 that I have received no species from Madagascar or the 

 eastern coast of Africa ; few from India, or from the coast 

 of China ; and I suspect, that on most of these coasts, only 

 few exist. Probably our third province will hereafter be 

 found to include the whole Indian Ocean. 



The fourth province is that of Australia, including New 

 Zealand : it has 30 species, of which 21 are peculiar. Had 

 the temperate Australian coasts (t. e., those south of the 

 isocryme of 68°) been alone considered, the number of the 

 species would have been probably 25, of which 20 would 

 have been peculiar, — that is, if we admit within the 20, 

 several species which range from the temperate into the 

 torrid zone, but do not extend beyond the Australian 

 shores. Owing to the widely-extended ranges of most Cirri- 

 pedes, no Arctic or Antarctic provinces can be said to exist. 



To recapitulate the above results, bearing in mind that, 

 although the total number of known existing Cirripedes is 

 147, yet that the habitats of seven are unknown, and that 

 eighteen are excluded owing to their being attached to 

 floating or swimming objects, so that there are only 122 

 species referred to in the following table : 



(1.) First, or North Atlantic Province, to lat. 30° N. ") 

 (If the West Indies had been included the num- > 

 bers would have been 42 and 28) . . .) 



(2.) Sub-province of South Africa 



(3.) Second province, or West Coast of North and ") 

 South America . . . . . . j 



(4.) Third province, or East Indian Archipelago . 



(5.) Fourth, or Australian province 



