POLY CHiETOUS ANNELIDS OF THE HAWAIIAN ISLANDS, 
1163 
Modified parapodia begin at eighteenth to twentieth somite. Figure 37 shows one from somite 25. 
A' rounded lobe appears at base of dorsal cirrus, and two irregular flattened expansions at base of 
ventral cirrus. Setigerous lobes elongated and broad, overlapping one another as shown in figure. 
Neuropodium and notopodium each with fan-shaped bundle of setae. Setae (fig. 38) with broad 
basal joint, into end of which fits the pointed end of the terminal joint; latter very broad, paddle- 
shaped, with row of minute teeth along one edge; basal joint with very fine transverse striations. 
Female larger than male and may reach length of 37 mm. 
Male usually not over 10 to 12 mm. long. Head and eyes like those of female. Modified parapodia 
like female except that dorsal cirrus is broader, and is lobed along ventral margin, as figured for 
heteronereis' phase of other species. Anterior “unmodified” parapodia in general form like those of 
female, but important differences in the character of dorsal cirrus; that of first parapodium like female, 
but from here backward the parapodia gradually increase in size until they are very long on somite 7 ; 
here they show a thick, cylindrical basal portion, with broad flattened tip ending in an acute point 
(fig.. 39). Setae as in female except for a single stout dark brown seta in dorsal bundle. On eighth 
somite dorsal cirrus has usual form, this and following “unmodified” parapodia agreeing closely with 
those of female except that the lobes are shorter, and compound setae are like those of somite 8 
(fig. 40). There are apparently two pairs of long anal cirri, but on account of poor preservation, it is 
impossible to be sure on this point. 
In both sexes anterior “unmodified” portion of body is filled with sex products, a complete 
degeneration of dissepiments and an almost complete disappearance of alimentary canal and body wall 
muscles having taken place. The sex products apparently arise in the posterior portion and are passed 
forward into the anterior region, where they are carried until ready to be discharged. Posterior region 
also well filled with sex products, but no very noticeable degeneration has appeared, except in the 
dissepiments, which are lacking, o 
Collected in considerable numbers at stations 3851, 3812, 3921, 3843, 3823, 3905, 3850, 3821. Some 
were marked “ surface,” others not. It is probable that all were taken while swimming. 
i Treadwell-Biological Bulletin, vol. ix, no. 4, September, 1905. 
