A NEW BRITTLE STAR FROM THE GALAPAGOS 



ISLANDS 



(With One Plate) 



By FRED ZIESENHENNE 

 The University of Southern California Invertebrate Laboratory 



During the winters of 1932-33 and 1933-34 it was a privilege to be 

 a member of a party of scientists on a zoological survey of the 

 Galapagos Islands under the leadership of Captain G. Allan 

 Hancock, who sponsored the Hancock Pacific Expeditions of 1932, 

 of 1933, of 1934, and of 1935. One of the most interesting specimens 

 taken on the 1933 Expedition was a new species of the genus 

 Ophioplocus taken in the waters of the Galapagos Islands. 



The author wishes to express his indebtedness to H. L. Clark, 

 Museum of Comparative Zoology, for his personal and invaluable 

 help in connection with the description of this new species and to 

 express his appreciation to the staff of the Museum of Comparative 

 Zoology for the opportunity of spending some weeks studying their 

 collections. 



OPHIOPLOCUS HANCOCKI, new species 



Plate 1, figures 1, 2 



Locality. — The original specimen was taken shore collecting on the 

 north sandy beach of Cartago Bay, Albemarle Island of the Gala- 

 pagos Islands at low tide, Feb. 13, 1933. It was collected from 

 beneath surface rocks in a sandy-covered tide pool in a foot of water 

 and partially imbedded in the sand. Its coloration blended in with 

 the sand so that it could easily be overlooked. 



An additional specimen was taken on a rocky tide flat, again em- 

 bedded in sand under surface rocks on Jan. 20, 1934, Station 168-34. 

 Another was collected at low tide in Academy Bay, Indefatigable 

 Isle of the Galapagos Islands. 



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