NO. 3667 POLYCHAETES—BANSE AND HOBSON 3a 
(rather than teeth) are well visible under 1000 (fig. 7¢). These 
capillary setae occur dorsally at least from the twenty-fifth setiger 
together with smooth ones. Starting from the seventh to tenth neuro- 
podia, the widened capillary setae are accompanied by two to three 
smooth acicular yellow spines without wings (fig. 7f). About two to 
three notopodial acicular hyaline spines appear at about the forty- 
fifth setiger (not the twenty-fifth as stated by Berkeley and Berkeley, 
1950). They are straighter than the neuropodial ones, and only as 
thick as the accompanying capillary setae. The spines do not encircle 
the posterior portion of the body. The serration of the notopodial 
capillary setae is weak. 
The specimens from Skidegate Narrows had originally been mis- 
identified as Caulleriella viridis pacifica, according to Berkeley and 
Berkeley (1950). The authors state in the same paper that C. viridis 
pacifica as described by Berkeley (1929) is a synonym of C. alata 
(Southern). The specimens on which the 1929 paper has been based 
are no longer available (Pettibone, 1967). 
The new species is named for Edith and Cyril Berkeley. 
Diacenosis.—A Chaetozone species with blunt prostomium and 
fairly smooth posterior region. Smooth neuropodial spines without 
wings and serrated capillary setae from the seventh to tenth setiger. 
Thin notopodial spines from the forty-fifth setiger. Some notopodial 
serrated capillary setae. 
DIFFERENTIAL DIAGNosIs.—Among the Chaetozone species listed by 
Hartman (1959; 1965b) to which C. acuta, new species, and C. curvata 
Hartmann-Schrider are to be added, C. abranchiata Hansen, C. atlantica 
McIntosh, and C. pacifica McIntosh have only capillary setae, accord- 
ing to the original descriptions (for C. abranchiata, see p. 31). Among 
the others, neuropodial spines occur before the twentieth setiger in 
C. andersensis (Augener) (see Hartman, 1967; spines from ninth 
neuropodium; posteriorly, one to two per ramus); C. armata Hartman; 
C. carpentert McIntosh (spines from about the tenth notopodium and 
neuropodium, with some very large spines among them); C. multi- 
oculata Hartman; and C. gayheadia Hartman (nearly straight spines 
from the first neuropodium; apparently no posterior cinctures). 
Spines can occur in C. acuta from the eighteenth neuropodium. 
None of the above species has serrated capillary setae. The distin- 
guishing features for the North Pacific species are given on p. 31. 
Chaetozone gracilis (Moore) 
Figures 7g, h 
Tharyz gracilis Moore, 19238, p. 187, partim. 
Not Caulleriella gracilis—Berkeley and Berkeley, 1950, p. 57; 1952, p. 37 [see 
p. 34 of this paper]— Hartman, 1960, p. 125. 
Not Chaetozone gracilis—Hartman, 1961, p. 111. 
