EREANTIATE POLYCHAETA OF JAPAN. 17 



marked by a more distinct blackish band. Subtentacles somewhat 

 fihform at tip, and provided with five rows of minute papillae. 



On the dorsnin of the basal joint of tentacular cirrus are a 

 single large spine and a minute tuft of tapering, serrated bristles. 



Elytra in 12 pairs, borne on same segments as in F. sqiia- 

 mata. They are all more or less circular in outline (fig. 10), and 

 do not quite cover the dorsum, but leave bare rhomboidal spaces on 

 same. They are of a more flexible nature than in the species 

 referred to, and are moreover . provided with only minute tubercles 

 with the exception of the first four pairs, which sliow both large 

 and minute tubercles. 



Dorsal bristles shorter, thiclcer, less tapering but more curved 

 than in P. squamafa, though similar in structure. 



Ventral bristles (lig. 11) with shorter, curved or falcate tip, 

 having less rows of spikes as compared with P. sqiiamata. 



Nephridial papillae commence to occur from the 8th segment, 

 and continue to tlie last parapodiated segment. 



iV marked difference between P. squamata and P. clara consists 

 in the facb that whereas in the fori nor species tlie body and tlic 

 last parapodia are of a diminutive size, the same in the latter 

 species are comparatively large. 



Habitat: — Jogashima, near Misaki (!) ; Shimizu Harbour in 

 Prov. 8 a ruga (!). 



Polyuoë srff/aniiana n. sp. 



PI. IV, ligs. 11 — 15. 



Pody elongate, measuring '21mm. in lengtli, tlie maximum 

 brcailtli on tlio xciid'al surface of lOth segment o.;") mm. without, 

 and 7.0 mm. with, i)ai'apodia and l)ristles. 



Prostomiinn (lig. 11) miieh w^dcr than long, its widest part 



