FISHERY BULLETIN: VOL. 70, NO. 2 



cussed (p. 461) whether the character should 

 be used in the generic diagnosis for the closely 

 related Chone. 



The observations on some primitive charac- 

 ters in Sabellidae by Banse (1970), especially 

 in regard to the abdominal uncini, are supported 

 by the observations on the species discussed be- 

 low. To those characters may be added the 

 glandular girdle on the second setiger which is 

 common to all species of Chone and Euchone and 

 is found also in the sabellid genera Jasmineira 

 Langerhans and Myxicola Koch. It is considered 

 to be a phylogenetically primitive character not 

 only because of the position of Chone and Eu- 

 chone within the family but also because similar 

 girdles occur in other families (e.g., Southern, 

 1914, for Terebellidae) . 



METHODS 



Because the form of the uncini can vary con- 

 siderably within the abdomen, the shape of the 

 setae in the anterior abdominal setigers is 

 stressed in the following descriptions. The ac- 

 cessory teeth above the main fang of an uncinus 

 are arranged in several vertical "columns" ap- 

 pearing in side view as horizontal (not strictly 

 so) "rows." The nomenclature for the abdom- 

 inal segments in Euchone follows Banse (1970). 

 The procedure for staining with methyl green in- 

 troduced by Hofsommer (1913) is described in 

 the same article. 



The following abbreviations are used: AHF 

 for Allan Hancock Foundation, University of 

 Southern California, Los Angeles, Calif.; FHL 

 for Friday Harbor Laboratories, University of 

 Washington, Friday Harbor, Wash. ; MCZ for 

 Museum of Comparative Zoology, Harvard Uni- 

 versity, Cambridge, Mass.; NMI for National 

 Museum of L-eland, Dublin; PMNH for Peabody 

 Museum of Natural History, New Haven, Conn.; 

 SMNH for Swedish State Museum of Natural 

 History, Stockholm; SEP for Systematics-Ecol- 

 ogy Program, Marine Biological Laboratory, 

 Woods Hole, Mass.; UCT for University of Cape 

 Town; USNM for U.S. National Museum of 

 Natural History, Washington, D.C.; ZMC for 

 Zoological Museum of the University of Copen- 



hagen; and ZMO for Zoological Museum, Uni- 

 versity of Oslo. When not noted otherwise, the 

 specimens are in my collection. 



SPECIAL PART 

 CHONE KROYER, 1856 EMENDED 



CHONE Kroyer, 1856, p. 13.- Sars, 1862, p. 119.- 

 Malmgren, 1866, p. 404.- Langerhans, 1881, 

 p. 111.- Saint-Joseph, 1894, p. 250.- Bush, 

 1904, p. 189.- Hofsommer, 1913, p. 332.- Mc- 

 intosh, 1923, p. 287.- Fauvel, 1927, p. 334.- 

 Berkeley and Berkeley, 1952, p. 122.- Ushakov, 

 1955, p. 417.- Day, 1967, p. 776. 



PARACHONIA Kinberg, 1867, p. 355. 



MEGACHONE Johnson, 1901, p. 430. 



METACHONE Bush, 1904, p. 190, 216. 



Type species: Chone infundibuliformis Kro- 

 yer (cf. Bush, 1904). 



Diagnosis: Sabellidae with semicircular bran- 

 chial lobes united by palmate membrane. Col- 

 lar conspicuous. Postsetal girdle of glands on 

 second setiger. Ventral shields sometimes 

 present. Ends of abdomen of typical sabellid 

 form. Three types of thoracic notosetae: up- 

 per, anterior ones limbate, sometimes in two 

 series of different length; lower, anterior ones 

 narrowly limbate ( bayonet- type ) ; and lower, 

 posterior ones spatulate or subspatulate. Tho- 

 racic neuropodial uncini long-handled, acicular. 

 Abdominal notopodial uncini avicular, with 

 square or rounded bases; abdominal neurosetae 

 limbate. 



Remarks: The emended diagnosis comprises 

 the same species as previously (cf. Hartman, 

 1959, 1965, and below), although it contains as 

 new characters the postsetal girdle of glands, 

 the ventral shields, the bayonet-like setae, and 

 the qualification "or subspatulate setae." The 

 usual occurrence of ventral nude filaments in 

 the branchial crown, the occasional presence of 

 otocysts, and the diagnostic characters pertain- 

 ing to the family are omitted. There are usually 

 eight thoracic setigers; very rarely a specimen 

 deviates from this number. 



460 



