fOLYCHAETE WORMS, PART 1 



301 



Paraonis {Paraonis) gracilis (Tauber, 1879) 



Figure 7d,a-d 



Paraonis gracilis Eliason, 1920, p. 55. — Monro, 1930, p. 150, fig. 58,a-d. — Wesen- 

 berg-Lund, 1950a, p. 32, pi. 7, fig. 34; 1951, p. 73; 1953, p. 59.— Uscliakov, 

 1955, p. 286, fig. 103,a,6.— Southward, 1956, p. 269.— Hartman, 1957, p. 330, 

 pi. 44, figs. 4-5; 1960b, p. 110. 



Description. — Length up to 25 mm., width up to 0.5 mm., seg- 

 ments up to 100. Parapodia with notosetae long, slender, capillary, 

 slightly limbate, becoming more slender posteriorly. Neurosetae 

 long, capillary. In more posterior segments (beginning on about 

 setiger 20) neurosetae of two kinds: 1-3 very long, fine capillary 

 setae; 3-6 short, stouter acicular setae in transverse row, with tips 

 slightly curved, darker amber-colored basally (fig. 79d). Proboscis 

 an eversible sac, somewhat lobulate, appearing ciliated. Anal end 



Figure 79. — Paraonidae, a-d, Paraonis gracilis: a, lateral view anterior end; h, same, 

 posterior end; c, branchial segment; d, posterior segment, e-f, Paraonis fulgens; e, 

 branchial segment;/, posterior segment, g, Paraonis lyra, lyrate notoseta (after Southern, 

 1914). 



