EREANTIATE POLYCHAETA OF JAPAN. 47 



ventral ones are somewhat shorter than the latter. Dorsal cirri 

 extend laterally nnd somewhat posteriorly beyond tips of ventral 

 bristles. 



Elytr;i in la pairs borne on segments 2, 4, 5, !.. 



21, 23, 2(), 29, o2. Tlie anteriormost pair of elytra, which are 

 of a rounded outline, are generally dull-white in colour, so that 

 they stand in prominent contrast with the general dark coloura- 

 tion caused by ii-regular accumulations of pigments, thus giving 

 to the animal a very bizarre appearance as if it had a pair of 

 large duU-wliite eyes. 



The remaing elytra are ovate-reniform or obliquely ovate in 

 shape. Tlieir jiosterior as well as lateral margins are fringed with 

 fine papilhe. 



The dorsal ramus of parapodium is but feebly developed and 

 bears a, series of yellowish bristles (T^l. V, fig. 3) Avith rather 

 distinct spinous nnvs and a wc^l-marked smooth part at the free 

 end. The ventral bristles (PL V, fig. 4) are light yellow in 

 colour, with rows of long spikes and bifurcated terminal hooks. 

 The ventral cirrus scarcely reaches in length to tip of ventral 

 parapodial ramus. Nephridial papilla? commence to occur on the 

 7th parapodium. 



Proboscis Jong, reacliing a lengtli al)out equal to that of the 

 anterior 10 setigerous segments taken together, and provided with 

 .2 strong jaws and t) })a])illa(' on cacli lip. 



Habitat : — Misaki (!) ; Yenosliinia in Pi-ov. Suruga (!) ; Sagami 

 Bay, 42 fathoms ("(ioMcn Hind"*); Totonii Sea, (!.") fatlioms and 

 12— 13 fathoms ("Albatross"); Kana/awa in Prov. Musashi (!) 

 Tatoku ill Prov. Sliiina(!); Naruto in Pi'ov. Awa (!) ; Sumoto in 

 Prov. Awaji ; Sakurajinia in I'rov. Satsuma (Prof. K. Mitsukitri) ; 

 Slilkanosbima in l'ro\. (hiknzcii ; (liilf of Miyazu in Prov, Tan- 



