NO. 3 HARTMAN : POLYCHAETOUS ANNELIDS 221 



7. Posterior dorsal lobes pale, triangular, smaller than middle 

 lobes (pi. 35, fig. 52) N. pelagica,\>. 225 



8. Area III of proboscis lacks paragnaths . A'^. flavipes, p. 226 



8. Area III of proboscis provided with paragnaths .... 9 



9. Posterior dorsal lobes elongate, rectangular (pi. 35, fig. 57) ; 

 area VIII with larger paragnaths and an oval area of smaller 

 paragnaths on the maxillary side . . . N. mediator, p. 227 



9. Posterior dorsal lobes with dorsal edge convex; area VIII of 



proboscis otherwise 10 



10. Dorsal lobe ventral to the dorsal cirrus is produced in posterior 

 parapodia (pi. 37, fig. 70) N. veleronisj p. 22S 



10. Dorsal lobe ventral to the dorsal cirrus is not produced in pos- 

 terior parapodia N. callaona, p. 227 



Nereis pseudoneanthes Hartman 



Nereis pseudoneanthes Hartman, 1936, pp. 470-471, fig. 47. 



Collections. — 260-34, 288-34. 13 specimens. 



Distribution. — Southern California; Gulf of California; Tangola- 

 Tangola, Mexico. Intertidal. 



Nereis riisei Grube 

 Plate 33, Fig. 37 



Nereis riisei Grube, 1856, pp. 162-163; Monro, 1933, pp. 43-44 (synon- 

 ymy) ; Hartman, 1938, p. 7 (synonymy). 

 Nereis ambiguus Treadwell, 1937, pp. 149-151, pi. 2, figs. 19-24. 



Collections.— n-3?>, 12-33, 13-33, 99-33, 120-33, 132-34, 148-34, 

 445-35, 495-36, 498-36, 633-37, 643-37, 788-38. Numerous individuals. 



All have deeply pigmented parapodial lobes. The dorsal lobe of pos- 

 terior parapodia is elongate triangular, inflated (pi. 33, fig. 37). Setae 

 are pale, acicula dark. Homogomph falcigerous setae have a delicately 

 toothed appendage. 



The peristomium is about one and one-half times as long as the first 

 parapodial segment. It and the anterior border of the prostomium are 

 dark. There are also paired patches of color on the atokous segments, 

 proximal to the parapodia. The peristomial cirri are slender, and appear 

 irregularly reticulated, the longest extending posteriorly to about the 

 fifth setigerous segment, the shortest about to the distal end of the pal- 

 podes. 



