194 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 19 



are most intense between dorsal parapodial bases. The prostomium ( Fig. 

 4) has distinct peaks and a deep median groove at the insertion of the 

 median antenna. The anterior prostomial eyes are under the frontal 

 peaks, and the posterior ones on the posterior third of the lobe; in addi- 

 tion, 10 to 20 irregularly dispersed small black spots are on the posterior 

 third of the lobe. Notosetae (Fig. 5) are of one kind; each is long, 

 slender, distally whiplike, and serrated along the cutting edge. Neuro- 

 setae are of two kinds ; supra-acicular ones are similar to the notosetae ; 

 subacicular setae are thicker and distally bifid (Fig. 6). 



Harmothoe priops is known from southern California, in shelf, slope 

 and canyon depths, in silty mud bottoms. 



Family HESIONIDAE 



Genus Hesionura Hartmann-Schroeder, 1958 



Hesionura coineaui difficilis (Banse, 1963) 



Eteonides coineaui difficilis Banse, 1963:197-200, fig. 1; Hartmann- 

 Schroeder, 1963:223-225, figs. 33-35. 



Collection: ^t^. 3595 (15^). 



The body is small, slender, measures 3.5 to 5.6 mm long; its color is 

 translucent yellow, with a dark brown pharyngeal region. The everted 

 proboscis is dark brown, completely covered with coarse papillae in dis- 

 persed arrangement. The long trapezoidal prostomium has two pairs of 

 long, cirriform antennae inserted at the frontal margin, and two or three 

 small black eyespots near its posterior end. The first segment is a simple 

 ring with a pair of long, tentacular cirri ; the second segment has a pair of 

 similar long, dorsal cirri and a pair of normal ventral cirri ; the third 

 segment is the first setigerous and has embedded acicula. The formula 



1 



may be expressed thus : 1 + — + Sa — . Parapodia are uniramous, 



N N 



with smaller dorsal and larger ventral cirri. Setae are in small, fan- 

 shaped fascicles, number about five or six in a bundle; all are composite, 

 the appendage bladelike and ridged along its length. 



Previously known only from San Juan Archipelago, Washington, in 

 20 and 100 m, from coarse, clean sand with broken shells, it is here 

 reported from Farnsworth Bank, outer side of Santa Catalina Island, 

 in 16 fms. 



