16 



PROCEEDINGS OF THE NATIONAL MUSEUM 



I have included Easter Island). All the remaining species of the 

 genus that occur in the area are distributed along and well within the 

 area circumscribed by the coral reef line, and a few extend into the 

 Indian Ocean as well. 



Seven of the nine species that have peripheral distributions are 

 endemics. Of these seven, all but one, E. rqfeni from the Tuamotus, 

 are from isolated island groups — Hawaiian, Marquesas, Easter. 

 Isolated islands are expected to harbor relatively more endemics than 

 centrally located islands in close proximity to other islands. Island 



TABLE 3. — Changes in orbital diajneter (as percent SL) with increase in SL of species 

 and subspecies of Entomacrodus (average for SL class followed in parentheses by 

 nuntier of specimens on which average is based and range of orbital diameter per- 

 centages for SL class) 



