EEPvAN'I'TÂTE POLYCHAETA OF JAPAN. 71 



Pi'oboseiR ((lg. 1), ill its protruded stato equals in longtli to 

 I lie îiiitrrior-inost 18 segments taken together, and its maximum 

 ))i'e;i(ltli ;tl)ont I of the lengtli ; encli of tlie dorsal and tlio ventral 

 li]» is |)i'(>\i(l('d. on tlie median line, with a sleiider papilla in 

 addition to a I'ow (^f 7 tootlidike stout ]ia])illae, of wliicli tlie 

 lateralmost one being much smallei' than the others ; the ventral 

 Tuedian jiapilla is al)oat | as long as the dorsal. Jaws two pairs, 

 eaeh l)eing furnished with a strong apical fang and a row of or 

 7 small teeth on the cutting edge. 



The tuhe in which this amielid lives consists of a very fine 

 th]vad-lik(^ substance coated with a layer of grayish fine mud of 

 ;d)out ") mm, in thickness. 



nal)itat : — Kotodine Mera just out, in Sagami Bay, 200 

 fathoms. 



Genus h*estio Moore. 



l^oth median and lateral tentacles entirely absent ; palpi well 

 developed ; o]mnat(>])h()res wanting or completely coalesced with the 

 sides ol" the ])rosto]niu]n, so that the eyes are sessile; perist(^mial 

 Y)ü\\n without setae. 



lie silo a runs Moore. 



Wh)'.). K(>sti() lunms, Moore. Troc. AcmcI. N:it, Sc. riiibul. A'ol. LY, p. 

 4-2:î; im. XXTY, figs. 21--21. 



This species was described by Moop^E li'om an antérieur i^iece 

 cotisisl iiig (if [»I'Dstiuniiim and M segmeiils, and measui'ing l^).") mm. 

 in Icnglii, ;ini| .'..iMnni. in brcjidlli. I ha\-e not obtaine(l a speci- 

 men IJKit conid he iikntilied with this species, so that 1 extract 

 thf loJIowinL:' <-harMet('i's iVoni Moore's desci'i|)tion : — 



i'l'ostominm sULfhtK' wider than lon'j\ i)rn;idl\' bilohate antci'iorlv 



