NO. 3 HARTMAN : POLYCHAETOUS ANNELIDS 223 



setae include heterogomph and homogomph spinigerous, and heterogomph 

 falcigerous, the appendage slender, finely serrulated (pi. 36, fig. 62). 

 Natatory parapodia are present from about the thirty-ninth parapodium. 

 The dorsal cirrus is crenulate, with 10 or fewer lobes (pi. 36, fig. 61 ). 



Nereis trifasciata Grube (1878, p. 74), like N. paucignatha, has few 

 paragnaths. Augener (1922, p. 177) enhanced the original description 

 and attributed homogomph falcigerous setae to it. In it, however, the 

 epitokous individual has few anterior segments, the male with only 14, 

 the female with 17; in A^. paucignatha there are about 38 anterior seg- 

 ments. 



Nicon eugeniae Kinberg (see Ehlers, 1897, p. 67) has numerous, 26 

 to 34, anterior segments in epitokous stages. According to Ehlers, how- 

 ever, the prostomium is longer than wide, the peristomial cirri are notably 

 shorter, and there are no homogomph falcigerous setae. Nereis goajirana 

 Augener (1933, p. 253) from the West Indies lacks homogomph falcig- 

 erous setae, as does also Nereis kerguelensis Mcintosh (1885, p. 225) 

 from the Kerguelen Islands. 



Holotype.— AHF no. 26. 



Distribution. — Salango Island, Ecuador. Pelagic. 



Nereis pseudonereis, new species 

 Plate 36, Figs. 63-64; Plate 37, Figs. 65-66 



Collections.— Z26-35 (Holotype), 364-35, 374-35, 384-35. 8 speci- 

 mens. 



Body long, slender; length of 68 setigerous segments (complete) is 

 20 mm, its width about 1 mm. Parapodia proportionately long, their 

 length over half the width of the body where best developed. Dorsum pig- 

 mented with a pattern of broken transverse stripes, a similar pigment at 

 the sides of the prostomium and on the proximal sides of the palpi. Pro- 

 stomium with a broad rectangular basal portion with 4 dark subequal 

 eyes, and a distal slender portion less than half as wide as the basal por- 

 tion (pi. 36, fig. 64). Prostomial antennae inserted proximal to one an- 

 other, their distal ends surpassed by the palpi. Palpi broad, flat, divergent 

 distally, terminate in an elongate article. Peristomial cirri slender, the 

 longest extends posteriorly to the sixth or seventh setigerous segment, 

 when directed posteriorly. 



Parapodia are pale except for the free ends of the dorsal, middle, and 

 ventral lobes which are dark (pi. 36, fig. 63). They are conspicuous 

 throughout, the lobes moderately long in the anterior half or about the 



