124 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



EURYDICE CONVEXA Richardson. 



Eurydice convexa RICHARDSON, American Naturalist, XXXIV, 1900, p. 217; Proc. 

 U. S. Nat. Mus., XXIII, 1901, p. 516. 



Locality. Cape San Bias, Florida. 



Head transverse; anterior margin rounded. Eyes quadrangular. 

 First pair of antennae short, reaching the middle of the last peduncular 

 joint of the second pair of antennas, or the posterior margin of the 

 head; flagellum four- jointed. Second pair of antenna? long, reaching 

 the anterior margin of the terminal abdominal segment in the female; 

 flagellum eighteen-jointed. In the male the second pair of antennae 

 are equal to the entire length of body, reaching the tip of the terminal 

 segment. 

 Thoracic segments subequal in length. 



Abdomen in female shprter than thorax and 

 head together; abdomen in male about equal to 

 thorax and head. 



First five segments equal in length. Terminal 

 segment rounded posteriorly, with post-lateral 

 triangular teeth, between which, a space interven- 

 ing, the posterior margin is denticulate, a spine 

 FIG. io7. ECKYDICE CON- alternating with each tooth. The uropoda are 

 VEXA. TERMINAL AB- s h or t no t reaching the extremity of the terminal 



DOMINAL SEGMENT. J 



segment. Both branches are truncate and crenu- 

 late on their exterior margins and fringed with long hairs. 



Color, light brown, with odd-shaped markings of black. 



A number of specimens were taken by the U. S. Bureau of Fisheries 

 steamer Albatross at Cape San Bias, Florida. 



Type. Cat. No. 10049, U.S.N.M. 



EURYDICE CAUDATA Richardson. 



Eurydice caudata RICHARDSON, Proc. U. S. Nat. Mus., XXI, 1899, pp. 824-825; 

 Ann. Mag. Nat. Hist. (7), IV, 1899, pp. 164-165. - 



Locality. Isthmus Cove, Catalina Island, California. 



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 antenna? extend to the posterior 

 margin of the head; flagellum consists of five articles, the first of 

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

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

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

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

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

 the flagellum consists of about twenty joints. 



