150 Leodicidce from Fiji and Samoa. 



with biiiooth aciculac in the setal portion and needle acicula^ as before. The dorsal 

 cirrus is long and slender, longer than the gills. The A^entral cirrus is rather long, 

 finger-shaped. A posterior parapodium (plate 5, fig. 5) has a setal lobe with a rounded 

 outline and no elongated postsetal portion. The dorsal cirrus is very long and slender, 

 the ventral one sharply pointed. There are 2 straight dorsal aciculse and 2 ventral 

 hooked ones. I could find no needle aciculse. Inside the body-wall is a large black 

 pigment spot just dorsal to the bases of the acicute. 



The gills in one specimen begin as a single very long and slender filament on the 

 third setigerous somite and the number of filaments increased to 2 on the fifth. Gills 

 extend to about the region of the one-hundred and twenty-fifth from the pygidium. 

 The largest number of filaments I could find in this specimen was 7. The dorsal 

 cirrus has much the appearance of a gill filament, but is a little longer than any of the 

 latter. The posterior gills are of but a single filament and very small. 



The compound setae (text-fig. 36) are similar throughout the body; the basal portions 

 have narrow shafts much broadened at the apices, the terminal margins minutely 

 serrated. The terminal joints have apical and subapical teeth, and a hood with 

 minute marginal denticulations. The simple seta is long and slender, with a very 

 slight increase in width toward the end and tapers gradually from this wider portion 

 to the extremely acute tip. The pectinate seta (text-fig. 37) has the usual form with 

 the terminal teeth the largest and about 9 other teeth along the edge. 



The acicula (text-fig. 38) is heavy, Avith a large subapical and a smaller apical tooth, 

 both covered by a hood. 



The jaw apparatus varies in color with the size of the individual, being much 

 darker in the larger and presumably older specimens. In the one figured (plate 5, fig. 6) 

 the maxilla was light brown, with darker transverse bands on the base of the forceps. 

 In a larger specimen the whole maxilla was one-third larger than the one figured and 

 very much darker, the terminal two-thirds of the forceps being nearly black, and there 

 was much dark pigment on the plates. In even the smallest specimens the shafts of 

 the mandible are black (plate 5, fig. 7). The carrier of the maxilla is small, the terminal 

 portions much curved. The right proximal paired plate has 7 teeth, the left one has 

 6, the right^ distal paired plate has 9, the left has 5, and the unpaired has 7. There is 

 on either side a small rectangular plate lateral to the distal paired. The mandible 

 has black shafts and a beveled portion Avhich is not A'ery sharply marked-off from 

 the shaft. On either side is a thin chitinous plate with an irregular margin. 



The type is in the American Museum of Natural History. 



Genus MARPHYSA Savigny. 

 J. C. Savigny, 1820, Systeme des Annelidas, p. 13. 



Similar to Leodice in most characters, but without nuchal cirri. 



Marphysa can always be distinguished from Leodice by the lack of nuchal cirri. 

 Other characteristics, which are usually but not always present, are the relatively 

 small size of the carriers of the maxilla, the presence of compound setse with long 

 terminal joints, at most only finely denticulated along one edge, instead of the toothed 

 distal joint covered by a hood, which is found in Leodice. A frequent feature of 

 Marphysa is also the pectinate seta; of the posterior end, which, instead of the fine 

 teeth of those farther forward, have only a few very heavy ones. 



Marphysa californica Moore. 



Plate 4, figures 12 to 14; plate 6, figure 1. 



Marphysa californica Moore, 1909, pp. 251 to 253, pi. 7, figs. 13 to 18; pi. 8, figs. 19, 20. 



Collected in sandy mud outside of mangroves in a lagoon a short distance southwest 



of Nuuli. In life the prostomium is a little wider than the peristomium, and its dorsal 



surface is greenish in color, the margins uncolored. The peristomium and the first 



few somites are dark green, the peristomium dotted with minute white specks, but 



