POLYCHAETOTJS ANNELIDS FROM PHILIPPINE SEAS. 615 



Gills beginning at about fiftieth somite. The poor preservation 

 made this almost impossible to determine. Gill a simple three-lobed 

 structure (fig. 5). Differentiation gradually lost until on ninetieth 

 parapodium gill is a flattened, knob-like structure. 



Setae of three kinds. Heavy, pale yellow, compound setae (fig. G) 

 ventrally. Simple capillary type (fig. 7) dorsally. Pectinate type 

 (fig. 8) just below dorsal cirrus. 



Type collected at station D5348, Point Tabonan, Palawan Passage, 

 -37.") fathoms, coral and sand bottom. 



LEODICE ARTICULATA, new species. 



Plate 50, figs. 9-12. 



This is not Eunice articulata Ehlers (1887), which has been shown 

 to be synonymous with Leodice long'wirrata Webster, the latter name 

 having precedence. 



Type. — Cat. No. 18955, U.S.N.M. A young, well-preserved speci- 

 men, 57 mm. in length, 5.5 mm. wide anteriorly, tapering gradually 

 posteriorly. Anal cirri two, consisting of five articulations. Number 

 of somites, 107. 



Head (fig. 9) provided with five tentacles, so articulated as to give 

 a beaded appearance. Median tentacle longest, reaching back to 

 anterior border of eighth setigerous somite. Intermediate tentacles 

 reaching to anterior border of fifth setigerous somite. Lateral tenta- 

 cles reaching fifth setigerous somite. Tentacular cirri similarly 

 articulated, extending slightly beyond anterior edge of peristomium. 

 Eyes round, in usual situation. 



As the specimens, both type and paratype, were } ? oung, the jaw ap- 

 paratus (fig. 10) was pale in color and soft in texture. Maxillae with 

 short basal joint, grooved dorsally for muscle attachment. Terminal 

 joint long, with slight curvature. Dental plates long and narrow, 

 provided with eight to nine brown teeth. Lateral plates short, with 

 nine small brown teeth. Eight unpaired plate with about seven small 

 teeth. Mandibles present, with light brown basal part and white 

 dental plate. On account of their softness they disintegrated upon 

 being touched, thus making it impossible to determine their structure. 



Gills beginning as single filament on dorsal cirrus of fifth parapo- 

 dium, gradually increasing to six and seven filaments toward middle 

 of body (fig. 11), continuing to within seven somites of end of body, 

 but gradually reduced to two filaments posteriorly. Dorsal cirri 

 sharply articulated, with three or four joints terminally (fig. 11), 

 and long, smooth base. Ventral cirri short, with cushion-like ventral 

 portion. 



Setae of two kinds. Ventral compound (fig. 12) with bidentate. 

 terminal portion covered by wing, and shaft finely serrated distallv. 



