166 



U.S. NATIONAL MUSEUM BULLETIN 2 27 



S-SIE 



VTT- VTir 



Figure 45. — Nereidae, a-d. Nereis succinea: a, dorsal view anterior end; h, dorsal view 

 posterior end; c, dorsal view extended proboscis showing jaws and general arrangement 

 of paragnaths; d, same, ventral view, e. Nereis arenaceodonta, dorsal view anterior 

 end with proboscis extended. 



except the postsetal ligule is rudimentary or lacking. Aciciila black. 

 Notosetae homogomph spinigers. Upper group of neurosetae homo- 

 gomph spinigers and heterogomph falcigers (fig. 44(Z) ; lower group of 

 neurosetae heterogomph spinigers and falcigers. 



Proboscis (fig. 45, c, d) with light amber-colored jaws, each with 4-9 

 teeth, with amber-colored denticles usually on all 8 areas : Area i, 1-6 

 denticles; areas ii and iv, arched gi'oups; area iii, oval group; area 

 V, 1-6 denticles (rarely 0) ; area vi, oval groups ; areas vii-viii, 2-3 

 irregular rows. Color, in life: brownish anteriorly including darkly 



