NO. 1 HARTMAN : POLYCHAETOUS ANNELIDS 149 



from Puerto Eugeniae (Swedish Expedition) and Chile (Plate collec- 

 tion). The so-called "adults" (pi. 17, figs. 9-10 of Ehlers), which 

 measured 20 cm long for 280 segments, in which simple hooks occur in 

 all segments, go to L. tetraura; the "Juv." (pi. 17, figs. 6, 7 of Ehlers), 

 which measured only 55 mm long for 135 segments, in which the 16-17 

 anterior segments have composite setae, are believed to represent L. 

 magalhaensis. Acicula were said to be light brown, straight, usually 2 in 

 a parapodium. The maxillary formula was described as 1-1, 4-3, 2-2, 1-1. 



L. tetraura (including possibly L. sarsi Kinberg) is thus retained to 

 include a species in which ( 1 ) simple, hooded hooks are present from the 

 first parapodium, (2) the postsetal lobes are large throughout, those in 

 the first 20 to 25 segments auricular, those thereafter slenderer, longer, 

 coming to be more or less erect, (3) the maxillary formula is 1-1, 4-4 

 (to 5-5), 2-2, 1-1, (4) the mandibles are fused for most of their length, 

 and (5) the prostomium is broad, blunt, usually paler than the rest of 

 the body. 



Distribution. — Tropical eastern Pacific, rarely off southern Cali- 

 fornia, south to Peru and Chile. Bathymetric range, shore to 40 fms. 



Lumbrineris erecta (Moore) 



Lumbriconereis erecta Moore, 1904, pp. 490-492, pi. 37, figs. 19-22, pi. 



38, figs. 23-25. 

 Moore, 1909, p. 254; Treadwell, 1914, pp. 196-197; Hilton, 1918, p. 



61; Chamberlin, 1918, p. 176; Hartman, 1942, pp. 120-121, 



fig. 11. 



Collections. — ?616-37 (small immature fragment); 634-37 (1); 

 724-37 (1); 728-37 (1); 738-37 (1); 902-38 (1); 903-38 (7);904- 

 38 (1); 905-38 (1); 906-38 (1); 907-38 (2); 910-39 (2); 913-39 

 (2); 945-39 (1); 1013-39 (2); 1045-40 (2); 1189-40 (1); 1193-40 

 (1) ; 1208-40 (12) ; 1209-40 (2) ; 1210-40 (2) ; 1218-40 (1) ; 1224-40 

 (1); 1230-41 (1); 1315-41 (10); 1439-41 (1); 1441-41 (many); 

 1441a-41 (1) ; 1442-41 (many) ; 1443-41 (many) ; 1445-42 (4) ; 1446- 

 42 (1); 1448-42 (2). 



The prostomium is usually short, more or less broadly rounded, de- 

 pressed, often paler than the rest of the body (hence much as in L. tet- 

 raura, above). The anterior segments, through about 35 to 49, are pro- 

 vided with pointed, bilimbate setae, unaccompanied by hooded hooks. (A 

 small, juvenile specimen, coll. 1224-41, has simple hooks from parapodia 

 26, and a still smaller one, coll. 1218-40, has hooks from parapodia 17, 

 indicating that with increase in size these hooks come to be gradually 



