ETYMOLOGY, NOMENCLATURE 7 



The specific name punctulata was given by Lamarck in 1816, and 

 retained by Gray (1835) when he named the genus Arbacia, removing 

 it from Echinus. The word punctulata doubtless refers to the shagreen- 

 hke surface of the dried test, though this is characteristic also of other 

 species (personal communication from H. L. Clark, 1947). . 



