ERRANTIATE POLYCHAEÏA OF JAPAN. 195 



Key to the genera found in Japan. 



■a.' Tentacles 4. 



h! Tentacular cirri in 4 ])airs ; first pair nnder ceplialic-lobe, 2nd and 

 3rd pairs on peristomial segment, and 4tli x^air on second 

 segment Phjllodoce. 



h." Tentacular cirri in 4 p lirs ; o pairs either on 1st segment alone 

 or on 1st and 2nd segments, and one pair on next following 

 segment Garobia. 



hJ" Tentacular cirri in 2 pairs Eteone. 



a." Tentacles 5, Tentacular cirri in 4 pairs. 



h.' 1st pair of tentacular cirri on Ist segment, wliicli is soldered to 

 ceplialic-lobe Eumida. 



b." 1st pair of tentacular cirri on 1st segment, wliicli is free from 

 ceplialic-lobe Eulalia. 



hJ" All the 4 pairs of tentacular cirri borne on 2 segments, the 2 

 slK^rter pairs iu front and tlie 2 longer pairs behind. . . Notophyllum. 



Genus Phyllodoce Savigny. 



Prostomium olongate, often longer than broad, oval, or cor- 

 date posteriorly. One pair of round eyes. Occasionally two rudi- 

 mentary nuchal organs ; four short tentacles ; four pairs of 

 tentacular cirri, the first pair under ceplialic-lobe, the second and 

 third pairs on peristomial segment, and the fourth pair on second 

 segment. Body elongated, llattoned ; segments two-ringed ; dorsal 

 cirri large, lamelliform, carried vertically ; ventral cirrus much 

 smaller than tlie dorsal. 



Phj/llodoce Uunelligera (Gmel.). 

 PI. XXT, fig. 1. 

 1791. Nereis lamelligera, Gmeliu. Liun. Syst. Nat,, ed. 13, p. 3120. 



