Leodicidce from Fiji and Samoa. 157 



2 the small nuchal cirri, which are entirely colorless and very small, so that they look 

 like two small white patches, one on either side of the somite. A very narrow band of 

 the posterior margin of somite 3 is colorless. Somite 4 has on either side on the dorsal 

 surface a triangular pigment patch with the apex pointed dorsally; somite 5 has a 

 similar but larger patch and on somite 6 and 7 these patclies from opposite sides have 

 united in the mid-dorsal line. These are yellowish brown like those on somites 2 and 3, 

 but are lighter in tint than on those somites. Behind somite 7 the pigment patch 

 begins in front of the parapodium, bends around it so as to lie dorsal to it, and then 

 extends dorsally to meet its fellow, leaving the posterior half of the dorsal surface of 

 the somite uncolored. On either side is a colorless patch similar to those on somites 

 2 and 3. Behind the region of somite 20 these patches disappear and the band of 

 pigment becomes entire, bifurcating at its ends so as to go on either side of the para- 

 podium. The pigment disappears behind the region of somite 50, the posterior end 

 being, so far as I can tell, without color. 



The first parapodium has relatively very large dorsal and ventral cirri and a large 

 acicula (plate 7, fig. 6). There is an antero- ventral and a postero- ventral setal lobe. 

 The tenth parapodium (plate 7, fig. 7) has a slender dorsal and heavy ventral cirrus, 

 2 postsetal and one presetal lobes, and a single large acicula which is colorless at the 

 base and end but dark in the middle region. A posterior parapodium (plate 7, fig. 8) 

 consists mainly of a rounded setal lobe with very small dorsal and ventral cirri and 

 2 black aciculae, the ventral one hooked at the end. 



The simple setse of the first parapodium are not very long, are very slightly widened 

 toward the end, and very sharp (text-fig. 47). In later somites these setse are much 

 longer and not at all widened (text-fig. 48) . The compound setse are very small, with a 

 minute terminal joint carrying a pointed terminal and a rounded subterminal tooth, the 

 two covered by a hood (text-fig. 49). Anteriorly the pectinate setse (text-fig, 50) are 

 small, with about 12 teeth. Posteriorly they are larger and with more numerous teeth. 



The pygidium was not present in any of my specimens. 



The mandible (plate 7, fig. 9) is thin and only very faintly colored, except for dark 

 bands at the base of the forceps and between the forceps and carrier. The carrier is 

 small, the forceps long and not much curved; the right proximal plate has 6 teeth, 

 the left has 5; the right distal paired plate has 9 teeth, the left has 4; the unpaired has 

 6. The mandibles (plate 7, fig. 10) are long and slender, the halves only slightly 

 united, and have practically no pigment. 



The type is in the American Museum of Natural History. 



Subfamily LUMBRINEREINiE. 



Ventral cirrus absent, dorsal cirrus rudimentary or foliaceous. No appendages or 

 evident gills, but with anal cirri. The maxillary plates are all paired, but the two of 

 the same pah* may or may not be symmetrical. 



Dorsal lobes, probably functioning as gills, have been described in Lumbrinereis 

 branchiata (Treadwell, 1921a, pp. 94, 95, plate 8, figs. 5, 6; text-figs. 333-343), but it 

 is doubtful whether these could be regarded as homologous with the gills of the other 

 Leodicidae. 



Genus LUMBRINEREIS de Blainville. 

 H. M. de Blainville, Dictionnaire des Sciences Naturelles, 1828, p. 46. 



Body elongated, without prostomial appendages or parapodial cirri. The first 

 somite interrupted ventrally by a forward extension of somite 2 to form the posterior 

 border of the mouth. Maxilla of short carriers, forceps, and 3 pairs of toothed plates. 

 Mandible about as long as maxilla, the two halves more or less fused. Setse compound, 

 simple, and hooked. 



