NO. 3 HARTMAN : ORBINIIDAE, APISTOBRANCHIDAE, PARAONIDAE 331 



only long pointed setae. Neuropodia have acicular setae first present 

 after several postbranchial segments; they are accompanied by longer 

 slenderer capillary setae (fig. 5). At maximum development, in posterior 

 segments they number about six in a transverse row. Genital papillae 

 have been observed between segments 30 to 60, located in front of the 

 parapodial bases (Monro, 1930, fig. 58). 



Paraonis filiformis Hartman (1953, pp. 39-40), from South Georgia, 

 is here referred to P. gracilis since there seems to be agreement in all 

 respects except that the prostomial lobe is subspherical (fig. 4) rather 

 than conical, and the neuropodial setae are flattened (fig. 5). Paraonis 

 (Paraonides) gracilis Monro (1930, pp. 150-152), also from South 

 Georgia, differs only in that the first segment is shown without para- 

 podia; this agrees with the account of Paraonis dubia (Augener, 1914). 



Eliason (1920, pp. 55-56) has recorded a high degree of variation 

 in the first occurrence of branchiae, noting that they are first present on 

 segment six or seven or not before segment 11 to 19. 



Distribution. — If the numerous records indicated above belong to a 

 single species, it may be concluded that Paraonis gracilis ranges along 

 both shores of the northern Atlantic Ocean, Greenland (Wesenberg- 

 Lund, 1950), southern Africa (Day, 1934), and Antarctic regions. 



Paraonis gracilis oculata, new subspecies 

 Plate 44, figs. 1-3 



Paraonis n.sp. Hartman, 1955, p. 179. 



Collections.— 2017-51 (1); 2026-51 (1); 2035-51 (3) ; 2107-52 

 (7); 2114-52 (9); 2116-52 (4); 2117-52 (4) ; 2125-52 (1); 2126-52 

 (1); 2142-52 (2) ; 2152-52 (4) ; 2153-52 (1); 2175-52 (3) ; 2176-52 

 (2) ; 2193-52 (1) ; 2202-53 (1) ; 2227-53 (9) ; 2228-53 (2) ; 2233-53 

 (3); 2294-53 (many); 2301-53 (3); 2307-53 (92+); 2311-53 (1); 

 2324-51 (1); 2337-53 (1); 2338-53 (1); 2389-53 (2); 2403-53 

 (2+) ; 2410-53 (1 or more) ; 2414-53 (3) ; 2418-53 (several) ; 2445- 

 53 (5) ; 2498-53 (1) ; 2625-53 (1) ; 2749-53 (several) ; 2835-54 (1) ; 

 2837-54 (6) ; 2839-54 (8) ; 2859-54 (2+). 



Total length is about 17 mm; width is 0.26 mm in the thorax and 

 less in other regions; number of segments is 80 or more. The body is 

 very slender, threadlike and resembles the tentacular filament of a 

 cirratulid with which it is sometimes associated. The prostomium is 

 depressed conical in shape and has a pair of eyespots (fig. 1). In some 

 (holotype in 2307-53) there are six prebranchial, eight to eleven branch- 

 ial and many abdominal segments. These numbers are variable, one 



