ERRANTIATE POLYCHAEÏA OF JAPAN. 243 



Typical parapodium (fig. 7) short, slightly longer than high ; 

 posteriorly situated parapodia' longer than tlioso more anteriorly 

 placed. Tlio two anterior lignlœ separated by a deep notch, 

 conical in shape, and nearly equally long. The two posterior 

 liguh\3 separated by a shallow notch, shorter than anterior ligulse, 

 with rcuinded end. Bristles of two kinds, simple and compound ; 

 the blade in the latter kind finely serrated. 



Dorsal cirrus arising from base of parapodium, short and 

 somewhat cylindrical in form, with rounded end. Ventral cirrus 

 arising from about the middle of the ventral border of parapodium, 

 large and stout, its end not reaching to middle of the inferior 

 border of posterior inferior ligula. In general, the parapodium 

 resembles very much that of Ghjcera opkthohranchiata, l)ut differs 

 markedly in the structure of gills. The gill in this species is 

 very large with dichotomously dividing branches, and arises from 

 the postero- superior surface of the base of parapodium. Well 

 developed gill bears as nmch as 10 branches, which spread over 

 tlie dorsal aspect of parapodium. 



The 240th i)arapodium (fig. 8) is much longer than typical 

 parapodium. \n it the posterior superior ligula is a little longer 

 than the posb'rioi- infei-ior, but still shortci' than i\\<i anterior two 

 liguhe ; the ventral ciriiis is a short conical process ; the tip 

 of gill does not reach to distal end of the parapodium, the number 

 of its braiieh<*s beiuiX reduced to 1"J. 



Anal segment sniall, and anal cirii short. 



i'roboscis measures, when i)rotruded, !)() mm. in length; the 

 ]>apillae (iig. !)) somewhat conical and more than twice longer 

 fhaii wide. Jaws more cnrved than in G. opisthohranchlata, and 

 the rod-like part of their basal prolongation well developed. 



Habitat: -On sandy shore, Misaki in Prov. Sagami (!). ■ ' - 



