120 



U.S. NATIONAL MUSEUM BULLETIN 227 



Washington, north Japan Sea. In low water to 444 fathoms; sexual 

 epitokes at surface. 



Eusyllis himelligera Marion and Bobretzky, 1875 



Figures 33, 34,a-d 



Eusyllis fragilis Webster, 1879, p. 217, pi. 4, figs. 42-43.— Sumner, Osburn, and 



Cole, 1913, p. 615.— Hartman, 1944a, p. 338, pi. 13, fig. 12, pi. 14, fig. 4. 

 Eusyllis tenera Verrill, 1882, p. 368. 

 Eusijllis lamelligera Fauvel, 1923, p. 294, fig. 113,a-e.— Banse, 1959, p. 433. 



Description. — Length up to 15 mm., width without setae up to 0.5 

 mm., segments up to 50. Prostomium with median antenna very 

 long (3 to 8 times the body width), lateral antennae about two-thirds 

 as long. Antennae, tentacular and dorsal cirri smooth or irregularly 

 wrinlded and not distinctly annulated. Sexual epitokous forms 

 (fig. 33) with swimming setae beginning on about setiger 12 (11-14), 



Figure 33. — SyUidae, Eusyllis lamelligera, dorsal view anterior end of sexual epitoke with 



swimming setae. 



