EEßANTIATE POLYCHAETA OF JAPAN. 237 



at its base nearly twice as thick as parapoclial lobes. Dorsal 

 cirrus, swollen at its basal region, terminates with blunt conical 

 tip ; not foliaccous. 



Typical posterior parapodium basally nearly as high as body ; 

 it ventral ramus longer than the dorsal and divided into two 

 rather short pointed anterior lobes and a much broader, leaf-like, 

 posterior lobe. Ventral cirrus elongate-conical, with a distinct 

 basal part arising from about the middle of the ventral border 

 of parapodium, its tip reaching to end of ventral anterior lobe. 

 Dorsal ramus united with dorsal cirrus for about J of its length. 

 Ventral bristles (fig. 7) compound with tapering, fringed terminal- 

 piece. Dorsal bristles few in number ; simple, shorter but stouter 

 than the ^'entl■al, tapering to fine point, with granulation on the 

 convex border. 



Proboscis very long, with papilla3 of two kinds : bluntly 

 conical ones wliich are very numerous, and somewhat larger ones 

 which have compressed bifid tip and occur more sparsely and 

 confined to tlie muscular ridge. Marginal lobes 1(5 or 18 ; jaws 

 black, principal ones 4-tootlied. Accessory jaws 1 — 3-tootlied ; 

 13 of them in the dorsal, and 10 in the ventral, interspace. 



Habitat : — Suruga Bay, 35-G5 fathoms (" Albatross ") ; Yodomi 

 ill Sagami Vmy, al)out 40 fatlioms (^Iv. K. Aoki). 



Family Glyceridae. 



Body sl('ri<l(i', uciiily round in cross-section, consisting of 

 iimnerous segments, wilh similar parapodia throughout. Prostomium 

 conicjil, :nnii;I;if('d, wifli I tentacles on tip. Parapodium either 

 biramous with simple hiistles on dorsal ramus and compound 

 bristbs (111 <])(' ventral, or uuii'amous showing onlv the ventral 



