122 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 15 



Origin of interramal cirri is not known. Notopodial cirri are long 

 and slender. The notopodial postsetal lamella is broad and foliaceous. 

 Some neuropodia have a long, cirriform erect process at the superior 

 edge but the origin or distribution of this process is not known. Setae 

 consist of preacicular barred, postacicular lanceolate and furcate spines. 



A. mirasetis resembles A. dibranchis (see above) in most of its 

 known characters, and may be identical. The reported number of pro- 

 boscidial rows is different, but this character may be erroneously stated. 



Distribution. — A. mirasetis (Hoagland) is known only from its 

 type locality, Tinakta Island, Philippines in 16 fms. 



Aglaophamus dicirris, new species 

 Plate 18, figs. 1-8 



INepkthys verrilli Cowles, 1931, p. 320. Not Mcintosh, 1885, p. 163. 

 Nephthys dibranchis Monro, 1933a, pp. 56-57, fig. 24; ? Treadwell, 

 1937b, p. 149; Hartman, 1938, pp. 144-146; Hartman, 1940, p. 

 237; ? Berkeley, 1941, p. 33; Hartman, 1945, pp. 7, 22. 



Collections. — The numerous individuals fall into 2 groups; in one 

 the interramal cirri are first present from segment 5, rarely 6. These 

 include: 185-34 (2); 187-34 (1); 213-34 (3); 250-34 (1); 421-36 

 (1); 436-36 (6) ; 492-36 (1); 513-36 (1); 667-37 (2) ; 668-37 (1) 

 770-38 (1); 1030-40 (1); 1052-40 (2); 1074-40 (2); 1078-40 (1) 

 1088-40 (1); 1096-40 (5); 1097-40 (2); 1117-40 (1); 1197-40 (1) 

 1275-41 (1); 1283-41 (1); 1295-41 (1); 1365-41 (7); 1374-41 (1) 

 1703-49 (1) ; 1732-49 (1) ; Beaufort, North Carolina (1). In a second 

 group the interramal cirri are first present from segment 7 or 8. These 

 include: 1069-40 (3); 1252-41 (1); 1254-41 (1); 1256-41 (2) ; 

 1265-41 (6). 



Collection 436-36 is selected as the holotype. Length of larger in- 

 dividuals is 27 to 44 mm but most are smaller. Some of the larger 

 specimens have the body cavity distended with ova, indicating possibly 

 full growth. The body tapers gradually backward and has no inflated 

 anterior region (preserved). There is no color except for the 2 dark 

 eyespots at the posterior margin of the prostomium. 



The prostomium is longer than wide and approximately rectang- 

 ular in shape when the proboscis is retracted (fig. 2). The anterior 

 margin is truncate and has a pair of subequal antennae, or also an ac- 

 cessory one (figs. 1,2). The 2 eyes are located at the postectal margins 

 just within the nuchal organs. The latter are conspicuous at the inner 

 bases of the first parapodia; when everted they resemble small fleshy 

 horns. 



