FJîKAXTr.VTE rOLVrTTAETA OP JAPAN. Ill 



IJi-aiu'liiac <1('0|) rod, tlio filaments ari'an«:^C(l in a spiral line 

 around tlie stem. 



Parapodinm somewhat long, though not well- developed; direct- 

 ed antero-laterally in 2nd-4th segments, which have no branchiae ; 

 l)oth dorsal and ventral cirrus long, with 2 kinds of strong curved 

 bristles (fig. l.")). 



From the 4th segmeiit posteriorly, hi those segments which 

 have hrauehiae, tlve parapodia are very small ; both dorsal and 

 vonti-al cirrus als(^ diminished in size. Especially the ventral 

 cirrus (^f the ()tli and 7tli parapodia is small, being represented by 

 a mere protuberance. 



Setose bristles almost straight (fig. lo), provided with wing; 

 pectinate bristles with unequal sides and teeth (fig. 14). 



Dental apparatus tinted by deep brownish black pigment 

 Maxillary forceps moderately cur^'ed, the basal portion being large ; 

 fi'om the middle on they taper gradually toward the tip. The 

 left great dental plate with 10 teeth, and the right witli D. The 

 left unpaird plate with 10 teetli. The left paired lateral plate 

 wiili 4 teeth, and the i-ight with 8 teetli. Mandibulae long, their 

 aiitci'ior (Mid widened <\\u{ witli calcareous mandibular plates, witli 

 in'cgulai'ly denticulated cutting edge. 



T1ie tiil)e (PI. I, lig. (*•), in wliidi this annelid lives, is very 

 cliaracteristic. It consists i)\' sandy giviins, fragments of shells, 

 le;i\cs of vai'ious land plants. mikI pieci^s of algae cemented together 

 l»\- a secictioiiof (lie animal. The ii|)pei' part <^f the tube exposed 

 alwixc (he sandx' Hat. is cemposetl of almost entire leaves of 

 liatiilioDs 111- ivrc^ and oi' olliei' sii I )sla iices. so that the al)0(le of 

 the woi'm can he casiK' made oii( at a glance. 



This animal is greatly used as liait, and is locally known 

 iiiidi-rlhe name o\', " Sii>j;o1<ai "". or •■ I* iihiiroisomc '*, 



