g24 PROCEEDINGS OF THE NATIONAL MUSEUM. 



4. EURYDICE Leach. 

 6. EURYDICE CAUDATA, new species. 



Body elongate and narrow. In male, abdomen is equal in length, to 

 thorax; in female, it is shorter. Surface of body smooth. 



Head widely rounded in front; its anterior margin narrowly thick- 

 ened. Eyes large and round and situated at a distance of one-third the 

 width of the head apart. First pair of antenn.c extend to the posterior 

 margin of the head; tiagelluin contains live articles, the first of which 

 is very long and those following quite short. The second pair of 

 antennae extend as far as the posterior mjirgin of the fourth segment 

 of the abdomen; the tlagellum consists of twenty-five long, slender 

 joints. In tlie female, the second pair of antenmc are much shorter, 

 reaching only to the posterior margin of the last thoracic segment; the 

 liagellnm contains about twenty Joints. 

 The thoracic segments are subequal. The epimera are narrow, and 

 those of the last three or four segments a<;utely 

 pointed. 



All the abdominal segments arc visible in a 

 dorsal view. The terminal segment is ronnded 

 at the sides and truncate at its extremity, the 

 lateral angles being produced in a short tri- 

 angular process, between wliich the posterior 

 margin is distinctly denticulate, and bears four 

 Fio. 3.— EoRYDicE CAUDATA; splucs, whlcli arc about twice as long as the lat- 

 LAST TWO ABLOMiNAL BEO- ^^^^ ^^^^^^^ rpjj^. uropoda axc sliort, not reaching 



MENTS. (iRKATI.YENLARfiEI). '■ 



the extremity of the terminal segment, are trun- 

 cate and crenulate on their posterior margins. The uropoda, as well as 

 the terminal, segment are fringed with short hairs. 



The legs arcdong aiul slender and armed with many spines. 



(3olor, light brown marked with black spots. 



Individuals of this species were collected at Isthmus Cove, Catalina 

 Island, California, by the U. S. Fish Commission steamer Albatross. 



Type.—^o. 225G5, U .S.N.M. 



This species resembles U. grimalcUi Dollfus ' more closely than it does 

 any other species of the genus. It differs in the following characters: 



1. The greater number of joints in the tlagellum of the tirst i)air of 

 antenn.e. In our species there are live joints, while in U. (jrinialfHi 

 the tlagellum is uniarticulate. 



2. In the fewer number of joints in the tiagellnm of the second pair 

 of antennic. In our species there are only twenty-live, while in J7. gri- 

 maldii the tlagellum contains thirty-two articles. 



3. In the presence of four spines on the posterior margin of the 



iBull. Soc. Zool. France, XIII, 1888, pp. 35, 36; Sar Quelques CrusUcda Isopodes du 

 Littoral <les A^oies, A. Dolllus. 



