138 Leodicidce from Fiji and Samoa. 



(plate 2, fig. 5), with an increase posteriorly of the number of two-branched gills, 

 but at about somite 40 the number is reduced to one. About 100 of the posterior 

 somites of the specimen are without gills, but I have no information as to the original 

 number of somites in the entire animal. On the right side of somite 16 the gill has 

 7 branches, and there are 6 on the left of somite 21. This large number of branches, 

 limited to only a single somite, is a very unusual condition. In an individual twice the 

 size of the one just described I could find no gill with more than 6 filaments. The 

 filaments remain relatively large to the end of the series and the blood-vessel in each 

 is especially prominent. 



The simple seta^ (text-fig. 8) are very slender, only slightly broadened toward the 

 end and taper to acute apices with very minute denticulations along one border. 

 The compound setae have small terminal joints, the subapical tooth the larger, and 

 with small denticulations along the end of the basal portion (text-fig. 9). Figure 9 

 is drawTi from a seta from the anterior end of the body. In the posterior region 

 the compound setae have longer terminal joints. The pectinate setae have about 20 

 slender teeth, the one at one end of the row longer than the others. The dorsal 

 aciculse (text-fig. 10) are bluntly rounded at the apex and dark-colored to the very 

 tip. The ventral ones have the tip uncolored, with bluntly rounded teeth covered 

 by a hood (text-fig. 11). 



The forceps and margins of all plates of the maxilla are dark brown, while the re- 

 maining portions are much lighter. The carriers (plate 2, fig. 7) are short, the forceps 

 long and much curved. This curvature is not adequately represented in the figure, 

 for the forceps are drawTi as pointing upward. The proximal paired plates have 

 5 teeth on the left and 4 on the right; the distal paired have 9 on the right and 5 on the 

 left, 2 of these being much smaller than the others. The unpaired has 8. Bej'^ond the 

 paired plates are rounded pigment patches in the chitin. The mandibles (plate 2, 

 fig. 6) are rather small and slender, the beveled portion being marked with pigment on 

 the outer and inner margins and with concentric lines on the surface. 



In structure of gill this species resembles Chamberlin's L. lita (1919a, pp. 240-244, 

 pi. 54, figs. 6-10; pi. 55, figs. 1-7), but in general body-coloration, form of the peri- 

 stomium, and character of jaws the two are unlike. 



The type is in the American Museum of Natural History. 



Leodice suviensis, new species. 

 Plate 2, figures 8 to 13; text-figures 12 to 16. 



A single specimen, collected in rock exposed at low tide on the west side of Rat 

 Passage, in Sm^a Harbor, Fiji. It measures after preservation 370 mm. in length, has 

 a prostomial width of 4 mm., and at somites 9 and 10 is 9 mm. wide. 



To the naked eye the living animal appears very dark, nearly black, while under 

 a hand lens the color is seen to be dark purple, with numerous dirty-white spots over 

 the surface. The tentacles are dark green, uncolored at the tips. All of the cirri 

 have uncolored tips. In preserved material the color is a dark brown, with numerous 

 yellow spots over the surface and a considerable iridescence. The prostomium is 

 rather small, 2-lobed, the tentacles smooth, short, and tapered gradually toward 

 the apices. The unpaired tentacle extends as far as the anterior border of somite 3, 

 the inner paired tentacles are about three-quarters as long as the median, the outer 

 pau-ed about half as long. The outer paired have their bases of attachment noticeably 

 farther forward than the inner ones. The eyes are in the usual position (plate 2, 

 fig. 8). 



The peristomial width is to its dorso-median length about as 5 to 3, and its antero- 

 lateral border has a prominent lip on either side. Somite 2 is about one-quarter as 

 long as somite 1, the nuchal cirri extending to about the middle of somite 1. The 

 ventral surface of the anterior region of the body is a little lighter in tint than the 

 dorsal, but otherwise is colored like the dorsal. In the type the pygidium is apparently 



