Table of the Distribution of the Genera of Asleroidea collected by the Challenger in the great Oceanic Areas, 

 showing the member of Species by which each is hwwn to be represented, and the number of Species 

 which are common to two or more Oceans. 



' The Oceans are indicated by Roman numerals corresponding to the numbers at the head of their column; and the Oceans in which a 

 common species occurs are placed together in the position of the numerator of a fraction ; the number of species common to them is indicated by 

 aD Arabic numeral in the position of the denominator. Thus ==p signifies that one species found in the Indian Ocean also occurs in the 



Eastern Archipelago ; — '—^ '- would signify that two species occurring in the Indian Ocean are found in the Eastern Archipelago, and also 



extend into the South Pacific. When a species is represented by a variety, and not the identical form, the numeral indicating the Ocean in which 

 the variety occurs is placed in brackets ; thus ^^ indicates that a species found in the North Atlantic is represented by a variety of that 

 species in the Southern Ocean. 



