DESCRIPTION OF A NEW PARASITIC ISOPOD FROM THE 



HAWAIIAN ISLANDS. 



By Harriet Richardson, 



Collaborator, Division of Marine Invertebrates, U.S. National Museum. 



The isopod, which is heroin described, was collected by the U. S. 

 Bureau of Fisheries steamer Albatross among the Hawaiian Islands 

 in 1902. This species was not included in my earlier report, because 

 additional material was sent in after that report was published. 



SCYRACEPON HAWAIIENSIS, new species. 



Body of adult female oval in outline, somewhat asymmetrical. 

 Color uniformly light yellow. 



Head very large, bilobed, and provided with a wide marginal 

 border on the anterior half. Eyes wanting. Both pairs of antennae 



FlG. 1.— SCYRACEPON HAWAIIENSIS, FEMALE, a, DORSAL VIEW. I), VENTRAL VIEW. (', LATERAL VIEW 



OF THORAX. 



small and inconspicuous; first pair composed of two joints; second 

 pair composed of four joints. Maxillipeds very large with theexo- 

 podite produced at the inner distal extremity into a long lamella- 

 like process with many smaller lamellae along its inner margin. 

 The lamella-like process of one side overlaps that of the other maxil- 



aBull. U. S. Fish Commission, vol. •_':!, pi. 3, L906, pp. 819-826. 



Proceedings U. S. National Museum, Vol. 38— No. 1770. 



645 



