POLYCHAETOUS ANNELIDS FROM PHILIPPINE SEAS. 621 



anterior border of third setigerous somite. Nuchal or unpaired cir- 

 rus prominent, arising anterior to nuchal ridge. Peristomium 

 forming two lateral lobes, one on each side of the mouth, reaching 

 beyond prostomium in expansion, but not showing from the dorsal 

 surface in contraction. Tentacular cirri attached at each side of 

 prostomium at base of peristomial lobes; 10 mm. in length — that is, 

 a little more than three times greatest width of body. 



First setigerous somite (fig. 9) with two dorsal conical cirri and 

 dorsal' setae tuft of simple capillary setae. Ventral cirrus lamelli- 

 form. Ventral setae tuft fan-shaped, composed of single row of 

 heavy, simple setae of two kinds — long, tapering, oar-like setae ar- 

 ranged alternately with shorter, cylindrical, blunt setae. 



Second setigerous somite with dorsal setae tuft of pale, .fine, 

 capillary setae. Ventral tuft of very heavy, dark-brown setae 

 (fig. 10) in a row similar to ventral tuft of first setigerous somite, 

 but with only three or four (curved) capillary setae. Dorsal 

 cirrus lacking. Dorsal lamella pointed, with apex directed dorso- 

 posteriorly. Ventral lamella rounded, beneath ventral setae tuft. 



Third setigerous somite with dorsal lamella similar to but less 

 pointed than that of second setigerous somite. Ventral lamella equal 

 in size and form to dorsal lamella. Dorsal setae tuft, composed of 

 simple capillary setae. Ventral tuft composed of similar setae ven- 

 trally, but of heavier, spinous setae dorsally (fig. 11). 



Fourth setigerous somite with dorsal and ventral lamellae similar 

 to preceding. Dorsal setae simple capillary. Ventral setae tuft 

 composed of simple capillary setae ventrally and curved, spinous 

 setae (fig. 12) dorsally, differing from spinous setae in preceding 

 somite in size and curvature. 



Fifth setigerous somite similar in lamellae and type of setae, but 

 with ventral setae tuft particularly large. Sixth somite similar to 

 fifth. 



Specimen collected at station D5209, Taratara Island, 20 fathoms, 

 green mud bottom. 



Family CIRRATULIDAE. 

 Genus CIRRATULUS Lamarck. 



CIRRATULUS ZEBUENSIS Mcintosh. 



Cirratulus zebuensis McIntosh (1885), p. 384. 



Capillary setae very finely serrated. Hooks absent anteriorly, 

 present in middle and posterior regions. 



Specimen collected from station D5304, China Sea near Hongkong, 

 34 fathoms, blue mud bottom. 



