1 62 Leodicidce from Fiji and Samoa. 



setae become more numerous, and a second, smaller form of seta appears. In a pos- 

 terior parapodia there are 6 of each form of seta. The bilimbate sets (text-fig. 53) 

 have long shafts, are noticeably curved toward the apices, with a striated wing which 

 is wider on the convex side of the curve. It was not always possible to see this JDilim- 

 bate structure, but this may have been due to the position the seta assumed in the 

 preparation. The second form of seta (text-fig. 54) may have a base nearly or quite 

 as broad as the bilimbate, but they narrow rapidly and terminate in a very slender 

 sharp apex which barely protrudes from the surface of the setal lobe. The acicula 

 is very large (plate 7, fig. 15, and text-fig. 55). 



The jaw (plate 8, fig. 10) is jet-black. The carriers are long and slender, the forceps 

 has a heavy basal portion with teeth on the inner margin of each half, the terminal 

 portion strongly hooked. The proximal pau-ed plates, each with four teeth, lie inside 

 the curves of the forceps. There are two pairs of distal plates, each with one tooth. 

 The mandible is represented by a pair of black plates lying in the wall of the pharynx 

 considerably in front of the maxilla. There is a small plate attached to the ventral 

 surface of the maxilla. This is really darker in color than is indicated in the figure, 

 where it is shaded lightly so as to be more readily seen. 



One specimen collected in Suva Harbor, Fiji. 



The type is in the American Museum of Natural History. 



Drilonereis paucidentata, new species. 



Plate 7, figures 16, 17; plate 8, figure 11; text-figure 66. 



Two individuals were collected, both very slender and very much elongated. One 

 was found in Suva Harbor, Fiji, and one in Pago Pago Harbor, Samoa. The following 

 description and figures are taken from the Samoan mdividual, which is incomplete but 

 has about 450 somites. Its prostomial width is not over 0.25 mm. and the average 

 somite length is 0.3 mm. I have designated as the type the specimen from Suva, 

 which is nearly twice the size of this but also lacks the posterior end. 



The prostomium (plate 7, fig. 16) is relatively rather large and is bluntly rounded. 

 It is only a little narrower than the average body somite and is about as long as somite 

 1. As is characteristic of this genus, the prostomium does not, as in Lumbrinereis , 

 thicken from the apex toward the base, but is of nearly uniform thickness throughout, 

 the vertical diameter being about half that of the first somite (compare fig. 14 of D. 

 lumbricm). In life the body has a yellowish tint which is most noticeable toward 

 tlie anterior region, while posteriorly the intestinal contents give the body a gray tint. 

 Preserved material shows a transverse brown band in the middle of each somite, but 

 this is apparently due to coagulated blood and appears in so many of the Lumbriner- 

 einse as to have little diagnostic value. _ 



The parapodia begin on somite 3 and are at first very small. They increase m size 

 posteriorly but never become very prominent. Each has when fully developed a 

 rounded setal lobe and a finger-shaped posterior lobe. Between the two on the ventral 

 surface a heavy acicula protrudes to a considerable distance beyond the surface of 

 the parapodium (plate 7, fig. 17). The setae are all of the same kind, differing only in 

 the length of the shafts. Toward the end each seta broadens and bends and narrows 

 rapidly to an acute tip. There is little distinction to be made between a central shaft 

 and a wing (text-fig. 56). , j • 



The jaws (plate 8, fig. 11) are jet-black. The maxilla has 2 long, slender earners; 

 the basal portion of the forceps is short and without teeth on the inner margins; the 

 terminal portion is relatively large. Each proximal paired plate has 5 teeth, each 

 of the second pair has 1 long and 2 short teeth, while each of the third pair has 1. 

 A dark triangular plate is attached to the ventral face of the carrier, but I saw no man- 

 dible. 



The type is in the American Museum of Natural History. 



