ERRANTIATE rOLYClIAETA OF JArAN. 105 



OiitfpJifs cii'vohranehiata (Mooro). 



ri. X[T, figs. 4—6. 



190,1. Oiinpliis cirrobraucliiiita, Moore. Proc. Acacl. Nat. Sc. Pliilad. 

 Vol. JA\ i>. 451. 



Body consists of aliout (10 soginents, measuring 42 mm. in 

 Icugtii, 2.5 mm. in l)i'oa(ltli excluding parapodia and 5.5 mm. 

 including tlicm at 10th segment. 



Prostomiiim small, neavly semicircular in dorsal aspect. Eyes 

 2, reddisli l)roAvn ; anterior tentacles rounded, J the length of 

 |)rostomium. 'I'entacles witli slioi't ammlated ceratophores ; styles 

 enlarged at base ; median tentacle the longest, reaching to 14th 

 segment; tlie inner latei-nls reach to 11th, and the outer laterals 

 to 4th segment. 



Tentacular cii'i'i scarcely reacliing to anterior boundary of pro- 

 stomium, and |)Ostei'iorly to the middle (^f Hrd segment. Tlie ord 

 segtnent is nearly equal in length t(^ jn'ostomium and peristomium 

 e()iiil)iiied or to Itli and 5t1i segments combined ; its anterior margin 

 miicli ^vider than the posterior and projecting laterally lieyond any 

 other anierior segment. Tiemaining segments are all of about 

 ('(jnal size except in fhe la])ering posterior regi(^n. 



iîranejilîic begin to appear from Dlthorllth segment usually 

 as a sin-jle and rarely as two lilaments. The number of filaments 

 inci'eases posb'i'iorly, and hy l>!th or 2l)(:li segment it reaches to 

 5. which sbile is maintained to about the 35th; after that the 

 liliinionls -radnallv deci-ease in number ]")Osterior]y, and in abont 

 the 571 !i segment they ai'e entirely replaced by small ])ranchial 

 (nhercles. The 5litli. the last ])ara])(^diated segment, has neither 

 branchial li!;imcnts nor t^jberch^s. 



