EEEANTIATE POLYOHAETA OF JAPAN. 193 



3rd, 4tli and oth segments, so that they appear like a white 

 band, traversing the middle of the segments. Posteriorly the 

 spots become more or less irregularly distributed. Besides these 

 spots many white wavy lines run antero-posteriorly throughout 

 the whole length of body, anastomosing and again dividing so 

 as to form a kind of network. Ventral surface of body white. 



Prostomium bluntly conical, anteriorly narrowed, with convex 

 lateral sides, divided into two lateral halves by a slight median 

 depression. Eyes in two pairs, situated in postero -lateral region 

 of prostomium ; those of anterior pair larger and more apart from 

 each other than those of the posterior. Tentacles small, one on 

 each antero -lateral corner of prostomium. Tentacular cirri on 

 each side 8 in number, arranged in two horizontal rows ; those of 

 the dorsal row longer than those of the ventral. Second dorsal 

 tentacular cirri tlio longest, reaching to the anterior margin of 

 ßth segment ; and the last ventral one the shortest, reaching to the 

 posterior border of 3rd segment, when stretched along the dorsum. 



The lines of (h^markation between segments are distinct on 

 the sides of body, but not so in the median parts of botli dorsal 

 and ventral body surfaces. 



Parapodium uniramous, of the form of an obliquely truncated 

 cone, its dorsal margin projecting laterally to form a small 

 pyramidal process. Dorsal cirrus consisting of a sliort cirrij)hore 

 and a long style, arising from dorsal base of parapodium. 

 Ventral cii-riis slightly longer tlian parapodium, arising from 

 distal cik! of (he l)asal third of parapodium. Acicula simple, 

 black, lîi'istlcs conipmiiid ; tlu« shaft green, the end-piece colour- 

 less or slightlv yellowisli, (iiicly sc^rrated on the concave side, 

 and with a, shui't broad-based and a lung slender process below 

 tei'min;il faiiir. 



