FISHERY BULLETIN: VOL. 70, NO. 2 



whereas posteriorly one larger accessory tooth 

 can sometimes be distinguished. Several col- 

 umns of teeth are present both anteriorly and 

 posteriorly. The long and short limbate abdom- 

 inal neurosetae are much finer posteriorly than 

 anteriorly. 



When treated with methyl green, the thorax 

 and the anterior part of the abdomen stain uni- 

 formly. This holds also for the first segment 

 which is visible only ventrally (Figure Ic). The 

 collar shows a variable pattern, not related to 

 locality or size of specimens. It can be either al- 

 most fully stained — nearly as intensive as the 

 trunk — or be almost devoid of stain-accepting 

 cells so that the anterior border of the first se- 

 tiger is indicated only by a midventral white line. 

 The intrasegmental furrow on the first setiger 

 can be weakly indicated or not visible. Stain- 

 accepting cells (and hence, presumably, the 

 glandularization of the body surface) are not 

 fully developed in juveniles. The cells are pre- 

 sent in conspicuous concentrations only along 

 the inter- and intrasegmental furrows leaving 

 free areas between them, especially dorsally in 

 the thorax. 



The holotype of Chone teres was inspected, 

 and the following additions to the description 

 may be made; slight differences from typical 

 C. infundibuliformis will be pointed out. The 

 common base of the branchiae is hidden below 

 in the collar which is relatively large (Figure 

 Ih). The collar ends dorsally at the posterior 

 border of the second setiger. The radioles are 

 of unequal length, as if some were regenerating. 

 The longest ones have very broad ends (Figure 

 li). Segments are clearly biannulate through 

 approximately the 35th abdominal segment; 

 posterior to this region, staining helps to rec- 

 ognize the intrasegmental furrows. The an- 

 terior border of the first setiger is visible only 

 ventrally and laterally (Figure Ih). The intra- 

 segmental furrow of this segment is indicated 

 merely by yellowish color after staining of the 

 animal with methyl green. The anterior border 

 and the intrasegmental furrow of the second 

 setiger do not reach the fecal groove. The glan- 

 dular girdle is irregularly broadened laterally. 

 On the following thoracic segments, the intra- 

 segmental furrows bend rearward dorsad of the 



notosetae and the intersegmental furrows bend 

 forward before joining the fecal groove. 



The setal bundle of the first setiger is only 

 slightly smaller than those of the following seg- 

 ments but is situated in a slightly more dorsal 

 position than that of the second setiger. As 

 already stated by Bush (1904), geniculate setae 

 are present in the remaining segments; the spat- 

 ulate setae have pointed tips (Figure Ij). Tho- 

 racic uncini are arranged in irregular double 

 rows in some parapodia. Abdominal uncini are 

 nearly identical anteriorly and posteriorly (Fig- 

 ures Ik and 11) . Their crests are almost straight 

 (less so posteriorly). Several rows of small ac- 

 cessory teeth are arranged in several columns. 

 The rostra do not surpass the bases of the uncini; 

 the cavities below the rostra are not rounded in 

 side view as in Greenlandic, C. infundibuliformis 

 (Figure If). 



Upon staining, the thorax does not accept the 

 dye dorsally as readily as laterally and ventrally; 

 similarly, the ventral epidermis of the abdomen 

 retains the dye longer than that of the dorsal 

 side. In the abdomen the tissues along the inter- 

 and intrasegmental furrows stain more strongly 

 than the fields between them so that most seg- 

 ments appear to bear three whitish rings rather 

 than one, the intrasegmental furrow. Yet, I 

 have the impression that the epidermis is fully 

 glandularized. 



Remarks: Chone teres is considered a syno- 

 nym of C. infundihuliforniis although the ab- 

 dominal uncini are slightly diflferent and the 

 ventral side in C. teres accepts stain relatively 

 more than the dorsal side. Noteworthy is the 

 shortness of the branchial crown which contrib- 

 utes approximately one-fifth of total length in 

 Greenlandic specimens preserved in their tubes, 

 but one-eighth in C. teres. All other specific char- 

 acters agree. When more material from Alaska 

 becomes available, special attention should be 

 paid to the mentioned deviating characters to 

 check the justification of placing C. teres in sy- 

 nonymy. 



The record of C. teres by Chlebovich (1961) 

 is not included among the synonyms of C. infun- 

 dihuliforniis because he lists C. cincta Zachs, 

 as described by Ushakov (1955), among his 



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