Leodiddxx jrom Fiji and Samoa. 135 



The smaller individual in life was very dark brown, almost black. The prosto- 

 mium was lighter brown in color, the peristomium greenish brown, with longitudinal 

 black markings, and very iridescent. The tentacles were greenish brown, with white 

 bands not regularly arranged and not uniform on the different tentacles. The re- 

 mainder of the body was dark purplish-brown, becoming purple at the pygidium. 

 There is one pair of stout purple anal cirri uncolored at their apices (plate 1, fig. 13). 

 The larger individual was quite uniformly dark brown, with a greenish tint at the 

 auterior end. The tentacles were faint green, with a darker tip, as were the dorsal 

 cirri. The cirri were not banded. The fourth and fifth setigerous somites were 

 lighter in color than the others, but did not show a distinct "collar." In alcohol, 

 both specimens are kwvn, though the larger is the darker; and more color is 

 retained in the tentacles. Both show numerous purple lines and streaks running 

 longitudinally on the dorsal surface. 



The prostomium (plate 1, fig. 12) is wider than the peristomium and very noticeably 

 4-lobed. The tentacles are all of about the same length, about as long as the peri- 

 stomium. The latter is slightly wider anteriorly than posteriorly, with straight 

 margins, and is as long as the following 5 somites. Somite 2 is very short and the 

 nuchal cirri are shorter than the peristomium. 



The first parapodium has the usual form, with a large dorsal and a smaller ventral 

 cirrus, with a very small setal lobe. Two good-sized aciculaj extend into the dorsal 

 cirrus, and there is one in the setal lobe. The tenth parapodium (plate 1, fig. 14) 

 has a gill of 16 branches, a very hea-s^ dorsal cirrus, which is longer than the gill, a 

 small acicula in the dorsal cirrus, and a very large one in the setal portion. A para- 

 podium from the posterior end of the body (plate 1, fig. 15). still shows the relatively 

 very large dorsal cirrus and, in addition to the acicular equipment of the anterior ones, 

 there is a ventral hooked acicula. 



In the smaller specimen the gills begin on the sixth setigerous somite (the entire 

 body having 180) and extend through about 120 somites. In the larger specimen they 

 arise on the fifth somite on the right and sixth on the left, but as the posterior end is 

 lost I am unable to give their extent. The basal portion of the gill is thick, giving it 

 a heavy appearance during life, but the branches are relatively small and short. 



The compound setae (text-fig. 3) are stout with a heaA^ shaft and a 2-hooked 

 terminal joint. In the anterior somites they are arranged in a formidable vertical 

 row, but diminish in number in the posterior. somites. The pectinate setse (text-fig. 4) 

 are small and slender, with about 10 teeth on the margin. The simple setae are very 

 long and slender, with a slender basal portion, widening slightly just outside the para- 

 podial margin, and beyond this tapering gradually to an acute point. Along orie 

 edge is a marginal wing, having very fine denticulations. A detail of the shaft is 

 shown in text-figure 5. The dorsal aciculse are blunt-pointed (text-fig. 6), the ventral 

 ones 2-hooked, with an uncolored apex and a very dark shaft (text-fig. 7). 



The maxillae (plate 1, fig. 16) have a short carrier, with long, slender forceps. The 

 proximal paired plates have each 5 teeth, the right paired with 9, the left with 3, the 

 unpaired with 6. All plates of the maxilla are very black. The shafts of the mandibles 

 are slender, but widen decidedly toward the cutting edge, and are very black in color. 

 The beveled portion is covered with a white incrustation (plate 1, fig. 17). 



Although this species has received much attention, it seems worth while to add the 

 above description, because, wliile I have no doubt as to the accuracy of the identifica- 

 tion, the various descriptions which have been written vary so much from each other 

 and from the specimens from Pago Pago that this must be a very variable species, 

 and it seems desirable to record as far as possible these variations. Ehlers's figures 

 are not very satisfactory, especially of the jaws, and the figure he gives of the simple 

 seta shows much more of a broadening in the shaft than I have seen. He gives two 

 figures of pectinate setae, with 7 teeth in one and 20 in the other. He figures no ventral 

 acicula. He states that the gills are longer than the dorsal cirrus, which is not true in 



