POLYCHAETE WORMS, TART 1 59 



129 °35' W., June 1955, larger and smaller specimens in L. anatifera; 

 27°56' N., 129°35' W., April 23, 1954, in L. anatifera and LJ. aurivillii, 

 with young; 26°12' N., 118°27' W., August 24, 1954, in L.f. aurivillii, 

 barnacles from Scripps material, collected by M. Johnson, identified 

 by D. Henry). 



Distribution.^ — Cosmopolitan, on floating objects: North Atlantic 

 (Massachusetts, Florida, near Bermuda, West Indies, Gulf of Mexico, 

 S.W. Ireland, Madeira, France), Mediterranean, South Atlantic 

 (St. Helena, West Africa), North Pacific (Japan, off southern Califor- 

 nia), South Pacific (Port Jackson, Australia), Indian Ocean (Ceylon). 



Genus Aniphinoine Briiguiere, 1789 



Type (designated by Baird, 1870) : Amphinome tetraedra Bruguiere, 

 1789; =A. rostrata (Pallas, 1766). Contains only one New England 

 species. 



Amphinome rostrata (Pallas, 1766) 



Figure 13,rf,e 



? Amphinome lepadis Venill, 1885b, p. 427. — Hartman, 1944a, p. 337, pi. 23, fig. 3- 

 Amphinome pallasii Wilson, 1910, p. 351. — Moore, 1903b, p. 793. — Fauvel, 



1923, p. 127, fig. 46. 

 Amphinome rostrala Willey, 1910, p. ISO.— Augener, 1922, p. 39.— Okuda, 1938, 



p. 78.— Hartman, 1951, p. 22, pi. 4, fig. 1.— Day, 1953, p. 408.— Fauvel, 



1955, p. 81, fig. 37.— Rioja, 1958, p. 223. 



Description.- — Length up to 400 mm., width up to 30 mm., seg- 

 ments 49-66. Prostomium wedged between setigerous lobes of first 

 segment, small, rounded, may be slightly bilobed anteriorly, with 

 5 subequal short subulate appendages (median antenna in middle, 

 lateral antennae anteriorly, palps latero ventral), with 2 eyes (?). 

 Prostomial caruncle small, cordiform, just posterior to median 

 antenna and extending on first setigcr. Paired branchiae large, bushy, 

 arborescent, branching dicotymously many times, beginning on 

 setiger 3 (or setiger 2) and continuing posteriorly. Dorsal cirri digiti- 

 forin, ventral cirri short, subulate. Some notosetae with fine capillary 

 tips, others harpoon shaped. Neurosetae few in number (5-7), short, 

 stout, hooked. Anus large circular opening embracing several seg- 

 ments. Color, in life: body bluish brown or bluish grey; cirri and 

 branchiae deep brown or red with orange tips. 



Biology. — The species is a common annelid in the littoral zone of 

 the West Indies. Found on floating logs, driftwood and other debris, 

 associated with stalked or goose barnacles, as Lepas anatifera, upon 

 which the worm feeds. Coloration suggests a protective resemblance 

 to the stalks of the barnacles to which it clings. Observed squeezing 

 between the valves of the barnacles and feeding on the soft parts 

 (Moore, 1903b). Observed continually crawling in and out of Teredo 



569-457—63 5 



