254 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 7 



the proboscis is provided terminally with paragnaths and the parapodial 

 change is considerably beyond the fifty-seventh segment. 



G. acicula approaches G. tripartita Monro (1931, p. 19) from the 

 Great Barrier Reefs in having a median region w^ith smaller, biramous 

 parapodia, but differs from the latter in that its parapodial lobes are dif- 

 ferently shaped ; the proboscis has 10 to 12 pieces in the chevron instead of 

 8 pieces; the large, stout jaw pieces at the distal end of the proboscis have 

 5 teeth instead of 3. G. japonica Izuka (1912, p. 232) from Japan has 

 ventral cirri that are proportionately much smaller ; also, the acicular no- 

 topodial setae are straight, not curved, the transitional region from ante- 

 rior to posterior, including only 2 segments. 



Holotype.— AHF no. 25. 



Distribution. — Gulf of California ; La Libertad, Ecuador. In depths 

 to 40 fms. The single specimen from Ecuador was taken at night with an 

 electric light. It appears to be a sexually mature male, but its setae are like 

 those of the dredged specimens. 



