FISHERY BULLETIN: VOL. 70, NO. 2 



united by palmate membrane for two-thirds of 

 length, with very long filiform tips. Two to three 

 pairs of ventral nude filaments. Collar approx- 

 imately as long as branchial basis, with deep 

 ventral incision. Lower thoracic notosetae sub- 

 spatulate. Uncini of anterior abdomen with 

 strong necks and few rows of teeth, bases with 

 small posterior elongation; uncini of posterior 

 abdomen with greatly enlarged crowns. 



Material studied: Paratypes from Stn. TRA. 

 73M, off South Africa, Ecological Survey, UCT. 

 311 m. Material at UCT, 3 specimens. 



Additions to the Description: The radioles 

 are flanged some distance beyond the palmate 

 membrane. Many pinnules of the middle sec- 

 tions of the radioles extend as far as the end of 

 the distal pinnules. The very long and filiform 

 tips of the radioles extend beyond this level. 

 Whereas Day (1961, Figure 14t; 1967, Figure 

 37.6J) depicted the branchial base as not con- 

 cealed by the collar; the branchial base in at 

 least one of the paratypes is hidden. A post- 

 setal girdle of glands is present on the second 

 thoracic setiger. The ventral shields are di- 

 vided within each thoracic segment. While Day 

 (1961) reported 32 abdominal setigers for the 

 holotype, 2 complete specimens have 25 and 25 

 or 26 abdominal setigers; 7 or 8 form the anal 

 depression. 



An uncinus from the anterior abdominal re- 

 gion is shown in Figure 111 (cf. Day, 1961, Fig- 

 ure 14n). The uncini of the posterior region 

 seem to be similar except that the number of 

 rows of teeth above the main fang is about 10 

 (Figure 11m). The number of uncini is anteri- 

 orly just below, posteriorly slightly above, a 

 dozen per torus. 



After using methyl green, the ventral shields 

 are bordered laterally by unstained epidermis 

 (Figure lln), except in the first thoracic seti- 

 gers. In the abdomen, intra- and intersegmental 

 borders appear broader than in the thorax, and 

 the outline of the shields becomes rounded (Fig- 

 ure llq) ; they are almost circular large patches 

 anterior to the anal depression. Broad, lateral 

 areas of staining cells are present on the first 

 and second thoracic setiger, and a small anterior 



and a large posterior patch are found around 

 each parapodium on the subsequent segments. 

 These patches seem to be characteristic for the 

 species. The posterior patches tend to form 

 crescents around the parapodia in the abdominal 

 segments. From about the middle part of the 

 abdomen, bands of scattered staining cells cross 

 the dorsal side forming two bands per setiger 

 and becoming most distinct on the depression 

 segments. 



Remarks: Euchone capensis has abdominal 

 uncini that are somewhat similar to those of E. 

 alicaudata, E. rosea, and E. rubrocincta. The 

 ventral incision in the collar and the distinct 

 abdominal ventral shields separate the South 

 African form clearly from the two latter species. 

 A clear distinction between E. capensis and E. 

 alicaudata is provided by the form of the ventral 

 shields of the first (buccal) segment (cf. Figures 

 llg and lln). 



EUCHONE VELIFERA NEW SPECIES 



Figure 12 

 EUCHONE sp. Hartman, 1955, p. 114. 



Holotype: Oflf Catalina Island, Calif., Velero 

 station 2412, lat 33°30'02"N, long 118°12'02"W, 

 593 m, fine mud, 17 Sept. 1953 (cf. Hartman, 

 1955). AHF, Poly. 0256. 



Paratypes: Off Point Vincente Light, Calif., 

 Velero station 4854, long 33°47'30"W, lat 

 118°30'00"W, 179 m, 8 Feb. 1957. AHF Poly. 

 0453, 2 specimens. 



Diagnosis: A large Euchone species with in- 

 distinct ventral shields, with 27 to 32 abdominal 

 setigers ; 7 to 9 form anal depression with large 

 wings. Nine to 10 pairs of radioles united by 

 palmate membrane for half of their length at 

 least in juveniles, with short filiform free ends. 

 Collar with lateral notches, ventrally deeply in- 

 cised and folded in between the two halves of the 

 branchial crown, concealing branchial basis. 

 Lower thoracic notosetae subspatulate. Uncini 

 of anterior abdomen with small crowns and 

 square bases; uncini of posterior abdomen with 



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