228 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



Porocidaris variabilis. 



Porocidaris variabilis A. Agassiz and Clark, 1907, Haw. Pac. Ech. Cid., p. 32. 



Plates 16-23, 33, figs. 1-4, Haw. Pac. Ech. Cid., A. Agassiz and Clark, 1907. 



This species was found by the "Albatross " to be common among the Hawaiian 

 Islands, and some very fine specimens were secured. The largest is deep purple, 

 and measures 85 mm. h. d. ; the others are various shades of brown, and one was 

 very light-colored, like cobosi. It is possible that if misakiensis is really distinct 

 from elegans, this species may prove to be identical with Yoshiwara's. 



