144 Leodicidce from Fiji and Samoa. 



fig. 8). The gills begin from the fourteenth to the twentieth setigerous somite. In 

 one individual there was a 2-branched gill on the left side of the seventh and no more 

 until the twenty-first, but this was exceptional. They arise as a single branch, but 

 become more complicated in the immediately following somites. One individual had 

 a 2-branched gill on setigerous somite 18, a 4-branched one on 19, and a 3-branched one 

 on 20. Throughout the greater part of the body the gills have 5 branches, the number 

 becoming reduced to 1 or 2 toward the posterior end, but they are relatively long. 

 The last gill is not more than 20 somites from the pygidium. The gills (plate 3, figs. 

 9 and 13) arise from the base of the dorsal cirrus and are large as compared with it. 

 The blood-vessel is also prominent. 



The pectinate setae have a very slender stalk, the apex widening to form a broad 

 and rather flat plate, carrying about 20 teeth. Proximal to each tooth is a small, highly 

 refractile spot. The compound setae (text-fig. 25) have a small terminal joint, with 

 a hood whose margin is finely denticulated, the basal joint being rather large. The 

 terminal joint has a blunt apical and a sharp-pointed subapical tooth. The simple 

 setae are very long and slender, tapering gradually to a sharp point, and with a narrow 

 wing on either side. 



As stated above, the aciculae are unusually large, especially through the median 

 region, as is shown in plate 3, figure 13. The dorsal one of the two has a bluntly 

 rounded apex and the ventral one is bifid (text-fig. 24). The aciculae of the dorsal 

 cirrus are also unusually large. 



The jaw apparatus is very dark brown in color. The maxilla (plate 3, fig. 11) has 

 a very short carrier, the forceps being long and slender and not much curved. The 

 right proximal plate has 4, the left 3 teeth. The right paired has 5, the left has 7, the 

 unpaired has 4. The unpaired plate is unusually small. The mandible (plate 3, 

 fig. 12), has slender shafts widely separated, the beveled surface nearly round in out- 

 line. On the beveled surface of the mandible and on the ends of the teeth of the 

 maxilla is a whitish incrustation. 



This species was first collected in rocks outside the entrance light in Suva Harbor, 

 Fiji. The surface of the rocks is much channeled by boring echinoids, and in the ridges 

 left between these channels, L. aciculata occurs in large numbers, being the most abun- 

 dant Leodicid that I found in Fiji. It was later collected in Samoa, a few individuals 

 occurring in the rocks in Pago Pago Harbor, but was more abundant in rocks from the 

 reef at Aunuu Island. Only a very few, however, were collected in Samoa. In a 

 collection of Hawaiian annelids sent me for identification in July 1921, by the U. S. 

 National Museum, was a single specimen of this species labeled as collected at Waikiki 

 Beach. It was larger than any others I had seen, measuring 350 mm. in length, but 

 was poorly preserved, so that this is only an approximate measurement. The coloring 

 is more intense than in those from Samoa (possibly owing to greater age) and the 

 brown bands on the cirri persist after preservation. 



The type is in the American Museum of Natural History. 



Leodice armillata, new species. 

 Plate 3, figures 14 to 19; text-figures 26 to 29. 



The living animal is reddish brown, with the second setigerous somite uncolored 

 and a row of white dots, one to each somite in the mid-dorsal line. The prostomium 

 is colored like the remainder of the body, but has an uncolored patch on either side of 

 the median tentacles. The tentacles are articulated, with greenish-brown pigment 

 in the interarticular grooves, the median tentacles reaching as far as the fifth somite. 

 The inner paired tentacles are almost as long as the median, the outer paired are much 

 shorter. All dorsal cirri are uncolored; the anal cirri two pairs, one very short and 

 colorless, the other pair much longer, colored light brown, but with uncolored tips. 

 Neither is articulated. 



