OCT 19 1917 



Bulletin of the Museum of Comparative Zoology 



AT HARVARD COLLEGE. 



Vol. LXI. No. 12. 



REPORTS ON THE SCIENTIFIC RESULTS OF THE EXPEDITION TO THE 

 TROPICAL PACIFIC IN CHARGE OF ALEXANDER AGASSIZ, ON THE U. S. 

 FISH COMMISSION STEAMER "ALRATROSS," FROM AUGUST. 1899, TO 

 MARCH. 1900. COMMANDER JEFFERSON F. MOSER, U. S. N., COMMANDING. 



XVIII. 



REPORTS ON THE SCIENTIFIC RESULTS OF THE EXPEDITION TO THE EAST- 

 ERN TROPICAL PACIFIC IN CHARGE OF ALEXANDER AGASSIZ, RY THE 

 U. S. FISH COMMISSION STEAMER "ALBATROSS," FROM OCTOBER, 1904, 

 TO MARCH, 1905, LIEUT. COMMANDER L. M. GARRETT, U. S. N., COMMAND- 

 ING. 



XXX. 



OPHIUROIDEA. 



By Hubert Lyman Clark. 



With Five Plates. 



[Published by Permission of H. M. Smith, U. S. Fish Commissioner]. 



CAMBRIDGE, M.\SS., U. S. A.: 



PRINTED FOR THE MUSEUM. 



October, 1917. 



