FISHERY BULLETIN: VOL. 70, NO. 2 



Description: Mature animals, with about 45 

 abdominal setigers, are 11 to 12 mm long, of 

 which approximately 3 mm are contributed by 

 the branchial crown, and 0.5 to 0.6 mm wide. 

 The smallest animal at hand has about 35 abdom- 

 inal setigers and is 5 mm long and 0.3 mm wide. 

 All specimens are well preserved. 



The branchial crown has six to seven pairs 

 of radioles, on an unusually high basis (Figure 

 7a), The radioles are connected by a palmate 

 membrane that extends beyond the origin of the 

 distal pinnules (Figure 7b). The narrow free 

 tips are one-eighth to one-sixth as long as the 

 radioles. Nude filaments were not found. 



The low collar usually does not conceal the 

 anterior part of the first (buccal) segment fully; 

 it is somewhat higher ventrally than laterally 

 (Figure 7a and 7c) and entire, except for the 

 dorsal slit which reaches to the intrasegmental 



furrow of the second setiger. The first segment 

 is sometimes distinct ventrally (Figure 7a). 

 The posterior border of the first setiger does not 

 quite extend to the fecal groove. Segments, ex- 

 cept the first one, are biannulate in the thorax 

 and the anterior half of the abdomen. The tho- 

 racic intrasegmental furrows bend rearward 

 similar to those of C. magna (cf. Figure 5e). 

 The postsetal glandular girdle of the second set- 

 iger (Figure 7a) is ventrally greatly broadened, 

 extending into the third setiger. Laterally it 

 is narrowed but still broader than on the dorsal 

 side where it is similar in width to that of other 

 species of Chone. The girdle has the same shape 

 in the smallest animal available. A longitudinal 

 band of whitish glandular tissue extends mid- 

 ventrally from the girdle onto the collar. Similar 

 tissue is present is rings near the anterior edges 

 of the posterior thoracic and about half of the 



# ^P 



25/. 



d-f 



Figure 7. — Chone veleronis new species; a and c from holotype, rest from paratypes; 

 d, f, not drawn to scale: a, ventral view of anterior end. Horizontal broken line in collar 

 indicates anterior border of first setiger seen occasionally. The two areas on the collar 

 encircled by broken lines remain whitish after staining with methyl green. The glandular 

 girdle has been dotted; b, tips of two radioles; c, collar of another specimen in same 

 view as in a; d, spatulate seta; e, thoracic uncinus; f, large uncinus from anterior ab- 

 dominal setiger; g, uncinus from 40th abdominal setiger from median position in torus, 

 17 ^ high. 



478 



