Leodiddce from Fiji and Samoa, 131 



third body-somite. Gills on more or fewer of the body somites. Jaw of maxilla and 

 mandible, the former of forceps, 2 pairs of toothed plates, and 1 unpaired plate. Man- 

 dible of symmetrical halves joined anteriorly to form a cutting edge. One or two pairs 

 of anal cirri. 



Leodice viridis Gray. 



Plate 1, figures 1 to 7; text-figures 1 and 2. 



Palolo viridis Gray, Stair, 1847, pp. 17-18. 



Paloh viridis Macdonald, 1858, pp. 237-239, pi. 41. 



Lysidice palolo Quatrefages, 1865, p. 379. 



Lysidice mridis Ehlers, 1864-1868, p. 367, pi. 16, figs. 17, 18. 



Lysidice viridis Collin, 1897, pp. 164-174. (Reprint pp. 1-11.) 



Pahlowurm Friedlander, 1898, pp. 337-357. 



Eunice viridis Ehlers, 1898, pp. 1-16. 



Eunice viridis Woodworth, 1907, pp. 3-21, pis. 1-3. 



Fully mature specimens were not found, and no measurements can be given of the 

 completely grown individuals. One specimen measured, after preservation, 270 mm. 

 in length and contained about 450 somites. 



The prostomium (plate 1, fig. 1) is noticeably 2-lobed, and when expanded is a 

 trifle wider than the peristomium. Dorsally it is colored a yellowish brown with 

 many minute yellow spots, the anterior margins and the ventral surface being coloriess. 

 The tentacles are colorless, blunt-pointed, and more or less wrinkled, the median one 

 reaching as far as the anterior border of the fifth somite, the inner paired to the middle 

 of the third, the outer paired to the second. Ehlers (1898, p. 5) is in error in describin g 

 the tentacles and cirri as jointed. The eyes are large. The peristomium is a little 

 longer than the prostomium ; its anterior margin bends around on either side so as more 

 or less to inclose the bases of the tentacles. It is colored much like the prostomium, 

 the pigment extending over the lateral faces but leaving the ventral surface uncolored. 

 The second somite is colored much like the first, but on its anterior border has an 

 uncolored band a little wider than the bases of the nuchal cirri. The nuchal cirri are 

 without color and extend about as far as to the anterior border of the prostomium. 

 The color is continued as far as the region of somites 18 to 20, but the anterior colorless 

 band in each somite becomes successively broader, so that behind the region of somite 

 20 the only body-color is that given to it by the contents of the intestine or, in the 

 posterior portion, the color of the sex organs. In very young animals, where the sex 

 products have not formed in sufficient quantities to produce a color, this posterior 

 region is colorless. In the posterior third of the body, except for the extreme posterior 

 end, each somite has a median ventral black spot. Woodworth (1907, plate 1) gives 

 colored figures of the species. I was unable, owing to the time of my visit to Samoa, to 

 collect the epitokous ends, but Woodworth's figure 3 corresponds very well with my 

 observations. 



There are two pairs of anal cirri, the ventral ones much the smaller (plate 1, fig. 2). 



Throughout the median region the gills appear as single filaments larger than the 

 dorsal cirri, to whose bases they are attached (plate 1, fig. 3), and in life are a bright 

 red color. In a specimen 250 mm. long the gills first appeared at the region of somite 

 137 and continued to about 180 somites from the pygidium. The first and last of the 

 series are the smallest and are not very prominent, but through the middle region, 

 where the gills are largest, they are prominent because of their color. 



The first parapodium has very prominent dorsal and ventral cirri and a very small 

 setal lobe, the latter with vertical, parallel, anterior and ventral lips. Two acicul*. 

 one much darker than the other, extend into the setal lobe, and there is a small tuft 

 of setae containing both simple and compound forms. On subsequent parapodia there 

 is a relatively great increase in size of the setal portion, and at the same time a shifting 

 of parapodial position, so that they come to lie higher on the lateral face. The first 

 parapodia, because of their ventral position, are partly hidden from a dorsal view 



