NO. 1 HARTMAN : POLYCHAETOUS ANNELIDS 173 



2. Postsetal lobe in posterior parapodia elongate, directed obliquely- 

 upward; prostomium usually lacks eyespots in adult; larger, 

 more robust A. semimaculata, p. 173 



Arabella Iricolor (Montagu) 



Lumbriconereis splendida Leidy, 1855, p. 15 



"iLumbriconereis longissirna Gnibe, 1856, p. 158. 



?Notocirrus margaritaceus Quatrefages, 1865, p. 368. 



Lumbriconereis opalina Verrill, 1873, p. 594. 



Aracoda multidentata Ehlers, 1887, p. 112. 



A. maculosa Verrill, 1900, p. 651. 



A. lagunae Chamberlin, 1919, p. 12. 



Fauvel, 1923, pp. 438-439, fig. 175; Berkeley, 1932, p. 313. 



Collections.— 5A5-36 (1); ?770-38 (1); 904-38 (1); 906-38 (2) 

 913-38 (1); 1024-39 (1); 1053-40 (1); 1077-40 (1); 1104-40 (1) 

 1123-40 (1); 1208-40 (3); 1210-40 (1); 1218-40 (5); 1222-41 (4) 

 1224-41 (1); 1260-41 (1); 1284-41 (3); 1311-41 (1); 1315-41 (1) 

 1342-41 (1); 1437-41 (5); 1446-42 (2); 1447-42 (1); A 14-39 (1) 

 A 15-39 (1); A 20-39 (3). 



The synonymy listed above includes records from the Western 

 Hemisphere. 



Distribution. — Cosmopolitan; both sides of the Americas. Largely 

 intertidal, it occurs less commonly to 46 fms. 



Arabella semimaculata (Moore) 



Aracoda semimaculata Moore, 1911, pp. 295-297, figs. 143-149. 

 A. munda Chamberlin, 1919, p. 176; 1919, pp. 258-259. 

 Hartman, 1938, p. 12. 



Collections.— ?>1S-?>S (2); 902-38 (2); 904-38 (1); 910-39 (2); 

 913-39 (1) ; 1063-40 (5) ; 1092-40 (2) ; 1208-40 (about 50) ; 1209-40 

 (1); 1210-40 (2); 1218-40 (9); 1310-41 (1); 1315-41 (1); 1415-41 

 (1); 1441-41 (1); 1443-41 (1) ; 1447-42 (1). 



Distribution. — California, south to Peru; usually intertidal, rarely 

 to depths of 46 fms. 



Arabella mutans (Chamberlin) 



Cenothrix mutans Chamberlin, 1919, pp. 329-333, pi. 61, figs. 1-9, pi. 



62, fig. 1. 

 Monro, 1928, pp. 91-92; 1933, pp. 88-89; 1933, pp. 260-261. 

 Collections.— 662-37 (1) ; 704-37 (1) ; 957-39 (1). 



