Leodicidce from Fiji and Samoa. 151 



posterior to the sixth to eightli somite the green color disappears and the whole body 

 has a flesh-color due to the blood in the body-walls. The gills are bright red and 

 are prominent in the living animal. In the preserved material all color is lost, and the 

 whole body has a milk-white appearance, with much iridescence at the anterior end. 

 The anterior end of the body is rounded in cross-section, posteriorly it becomes very 

 flat, as is common in this genus. 



An entire specimen after preservation is 160 mm. long, 1.5 mm. wide at the peri- 

 stomium, and 3 mm. wide in the widest part. This is considerably smaller than Moore's 

 type, but about the size of his cotype, assuming that his "3 mm." refers to the body- 

 width. 



The prostomium (plate 6, fig. 1) is laterally rounded and deeply bilobed, so that if 

 the median constriction were deepened each half would form nearly a circle. The 

 tentacles are slender, the unpaired the longest, the others successively shorter, but all 

 at least twice the length of the prostomium. The eyes are very small, situated between 

 the bases of the inner and outer paired tentacles. Moore's specimens lacked the pos- 

 terior end. The pygidium of the Samoan specimen has 2 pairs of anal cirri, one pair 

 much larger than the other, both situated ventral to the large oval anus (plate 4, 

 fig. 12, ventral view). 



The parapodia are as described by Moore. The setal lobe becomes more and 

 more pointed toward the posterior somites and the ventral cutus is very large and thick, 

 fused to the setal lobe for the greater part of the length of the latter (plate 4, fig. 13). 

 I found 4 aciculse in anterior somites, 3 in the forty-fifth (plate 4, fig. 14), and 2 in the 

 one-hundredth parapodium, which is essentially in agreement with Moore's description. 

 The only lack of agreement is in the character of the ventral acicula, which comes to 

 the surface just dorsal to the ventral cirrus. Moore did not find this in his type and in 

 the cotype it is bifid and hooded. I find it present in all except the anterior parapodia, 

 but its form is very unusual in that it is not bifid and hooded, but has a straight end, 

 bluntl}'' rounded at the apex, quite similar to the other aciculse. 



The gills in one specimen begin as 1 short filament on the twenty-fifth parapodium, 

 on the twenty-sixth there are 3 very short filaments, and from here the number in- 

 creases gradually to a maximum of 6. The filaments are slender and arise from a 

 base which is very thick at the point of attachment and gradually narrows with the 

 formation of each successive filament. The last gill has only one filament and is on 

 the twentieth somite from the pygidium. The number of somites is approximately 

 300, so that gills extend over about 250 somites. 



I can add nothing to the description Moore gave of the setae or jaws except to make a 

 slight change in nomenclature of the maxillary plates. Moore's figure 19, plate 8, 

 is the left half of the maxilla (erroneously referred to in the text as the right). His III 

 is the unpaired plate and his IV the left paired according to the nomenclature I am 

 employing in this paper. 



Marphysa macintoshi Crossland. 



Marphysa macintoshi Crossland, 1903, pp. 137-138, pi. xiv, figs. 3 to 6; text-fig. 12. 



A number of specimens collected in Suva Harbor, Fiji, which I have identified as 

 belonging to this species because of the peculiar form of the undivided prostomium, 

 the character of the jaw apparatus, and the general form of the parapodia. In the 

 Fijian specimens the gills had fewer branches and the dorsal cirri were longer than 

 indicated in Crossland's figure 6. 



Marphysa simplex, new species. 

 Plate 5, figures 8 to 12; text-figure 39. 

 One specimen collected in Suva Harbor, in association with M. macintoshi, and 

 much like it in general appearance, but differing decidedly in the form of the prosto- 

 mium and tentacles. While in macintoshi the prostomium is shaped like a broad hoof 

 of a horse, with no trace of a median indentation, in M. simplex (plate 5, fig. 8) it is 



