Ophelina ci/lindricaiidata (Hansen. 1879) 



Oplieli)ia cjflixdriccuidata. - St0p-Bowitz, 1945: 



49. Fig. 5. 

 [?| Antmotnjjxuie chcictifem Hartman. 1965a: 



187, pi. 43. 



D( script ion. — Body .slender, tapered at both 

 ends, 8-19 mm long for 26-28 setlgers. No 

 achaetous preanal .segments. Prostomium coni- 

 cal and pointed. A ventral groove starting from 

 setiger 2. Parapodial lobes uniformly small and 

 button-shaped. Cirriform branchiae from setiger 

 2 to 24, followed by 3-4 abranchiate setigers 

 (Figure 13g). Branchiae of middle segments 

 small or occasionally absent. No lateral eye- 

 spots between parapodia. Pygidium cylindrical 

 and about equal to length of last five or six 

 setigers. Superior anal cirri as mere crenula- 

 tions on dorsal lobe over anus; ventral cirrus 



stout, annulated and digitiform. Anterior setae 

 fairly long, those of middle segments progres- 

 sively shorter and those posterior abranchiate 

 segments stout, almost acicular. 



Rt 111(1 rks. — As originally described by Han- 

 sen, AnniniDifpinic c!/li)idricaudatu was said to 

 have 34 .setigers, but St0p-Bowitz (1945) states 

 that the type has 28 setigers and that the bran- 

 chiae in the middle of the body are very variable; 

 in some they are slightly reduced, in others 

 very small or even absent. Possibly A. chactifera 

 Hartman, which has gills on a few anterior and 

 a few posterior segments, but none over most 

 of the body, is synonymous. St0p-Bowitz has 

 shown that Opiuliiia Oersted antedates .4/h/ho- 

 t)-!ipinii Rathke, by a few months. 



R( cards. — Common off Beaufort in 120-200 

 m (21, *). 



Distriliiitioii. — Norway; Greenland; Canada; 

 Mediterranean; 30-911 m. 



FAMILY SCALIBREGMIDAE 

 Key to genera and species 



1 Anterior setigers with branched gills and posterior setigers 



with dorsal and ventral cirri. No acicular setae {ScalibrcciDMi). 



1' Body without gills or any parapodial projections. No acicular 

 setae. {Hi/lniscolcx) 



S. iiifiatiim 

 H. loHf/iscta 



Scalibregma inflatiim Rathke, 1843 



Sculibrcf/nni injiatiiin. - Fauvel, 1927: 123, Fig. 

 44 a-f. - Day, 1967: 590, Fig. 27.2. e-j. - 

 Hartman, 1969: 313, Fig. 1-4. 



Records. — Cape Hatteras area and Beau- 

 fort, intertidal and 160 m in mud (18, *). 



Distribution. — Cosmopolitan from the Arctic 

 to the Antarctic; intertidal to 160 m in mud. 



Hyboscolex longiseta Schmarda. 1861 



Hyboscolex longiseta. - Day. 1967: 584 (synon- 

 ymy), 588, Fig. 27.2. a-d. 



Oncoscolex pacificus. - Hartman, 1969: 311, 

 Fig. 1,2. 



Description. — Body arenicoliform, up to 20 



mm long for 60 segments; color pale to black. 

 Prostomium (Figure 13h) with stout lateral pro- 

 jections and thus broadly T-shaped. Eyes visi- 

 ble if prostomium extended. Buccal segment 

 very short and achaetous. Anterior segments 

 (Figure 13i) with four annuli; posterior ones 

 with two or one. No parapodial projections, the 

 setae projecting directly from body wall. No 

 gills or cirri. Setae as smooth capillaries plus a 

 few short forked setae feathered on inner mar- 

 gins; no acicular setae. 



Remarks. — The synonymy of the genera 

 Hiiboscolex, Oncoscolex, Euinenia. and Poly- 

 j)lnisia is confused. Discussion will be found in 

 Day (1961: 216; 1967: 584). 



Records. — On corals off Beaufort in 18 m 

 (20, *). 



Distribution. — South Africa and western Ca- 

 nada to Pacific coast of Mexico; intertidal to 

 10 m. 



96 



