PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



issued |^it\>L. Oh ^ by the 



SMITHSONIAN INSTITUTION 



U. S. NATIONAL MUSEUM 



Vol.87 W..hington:1939 No. 3067 



TWO NEW PARASITIC ISOPODS FROM THE EASTERN 

 COAST OF NORTH AMERICA 



By A. S. Pearse and Henry A. Walker 



Entoniscids are degenerate isopod crustaceans that live within, 

 or at times outside, the bodies of other crustaceans. They have not 

 hitherto been reported from North America, though they have been 

 found in Brazil and Greenland. This paper describes two new 

 species, from North Carolina and Prince Edward Island. These 

 were taken from xanthid crabs. During the summer of 1938 we 

 examined 622 specimens of Panopeus herhstii Milne-Edwards at Beau- 

 fort, N. C, and 227 Neopanope texana (Smith) at Ellerslie, Prince 

 Edward Island. From these males, females, eggs, larvae, and young 

 entoniscids were obtained. Grateful acknowledgement is made to 

 Dr. H. F. Prytherch, director of the Beaufort Biological Station of 

 the United States Bureau of Fisheries, and to Dr. A. W. H. Needier, 

 director of the Prince Edward Island Station of the Fisheries Re- 

 search Board of Canada, for many courtesies extended to us at their 

 respective stations. 



Genus CANCRION Giard and Bonnier 



CANCRION CAROLINUS, new species 

 FlGUBB 12 



Female. — Body bent, so that the dorsal side of abdomen is against 

 the dorsal side of thorax; length, flexed 15 mm., extended 24 mm. 

 The cephalogaster bears two large ovate lobes, 2.5 mm. long (fig. 12, 

 5, eg) ; in front of these are a pair of small (0.5 mm.) spherical 



141856—39 19 



