REVISION OF PILARGIDAE PETTIBONE 191 



acicular setae (not hooked) ; dorsal cirri short, subulate. Neuropodia 

 cylindrical, with neuroacicula and simple neurosetae; neurosetae 

 capillar}^, linibate; ventral cirri short, subulate. Pygidium with 

 pau'ed short anal ckri. Proboscis unarmed, cylmdrical. Without 

 intestinal caeca. Integument smooth, w^ith thick, highly u-idescent 

 cuticle, not papillated or areolated. 



A single species has previously been referred to Synelmis, S. simplex 

 Chamberlin, 1919, p. 177. Tuamotu Islands, South Pacific. Herein 

 referred to S. albini (Langerhans) , see below. 



A single species has previously been referred to Kynephorus, K. 

 inermis Ehlers, 1920, p. 27. Amboina, Indonesia. Herem referred 

 to S. albini (Langerhans) , see below. 



A single species has been described previously under Glyphohesione, 

 G. klatti Friedrich, 1950, p. 169. Off Helgoland, North Sea. See 

 Eliason, 1962, p. 29, as Ancistrosyllis klatti. Herein referred to 

 Synelmis, perhaps young of S. albini^ 



Other species were described under Ancistrosyllis and are being re- 

 ferred to Synelmis albini. See below and page 165. 



Key to the Species of Synelmis 



1. Dorsal cirri of first setiger similar to following. Dorsal and ventral cirr 



subequal S. albin 



Dorsal cirri of first setiger about 2 times longer than following. Dorsal cirr 

 longer than ventral cirri, extending beyond parapodial lobes . . S. klatt 



Synelmis albini (Langerhans) 



Figures 19-21 



Ancistrosyllis albini Langerhans, 1881, p. 107, fig. 16, a-e. — Hartman, 1965, p. 70. 

 Synelmis simplex Chamberlin, 1919, p. 177, pi. 28, figs. 1-5. 



Ancistrosyllis rigida Fauvel, 1919, p. 337, fig. 1, a-e; 1932, p. 64; 1953, p. 7. — 

 Augener, 1927, p. 50.— Hartman, 1947, p. 498, pi. 62, figs. 1-7; 1954, p. 629. 

 Kynephorus inermis Ehlers, 1920, p. 27, pi. 3, figs. 1-9. 

 Ancistrosyllis gracilis Hessle, 1925, p. 34, fig. 12. 

 Ancistrosyllis gorgonensis Monro, 1933a, p. 26, fig. 12, a-d. 



Remarks: Ancistrosyllis albini, described by Langerhans in 1881 

 from the Canary Islands, was evidently overlooked by Chamberlin, 

 1919 (Synelmis simplex), Fauvel, 1919 (Ancistrosyllis rigida), and 

 Ehlers, 1920 (Kynephorus inermis) . Augener, 1927, synonomized iiC. 

 inermis with A. rigida. He also suggested that both inermis and 

 rigida might well be referred to A. albini and that the apparent differ- 

 ences could be due to preservation, since A. albini was described and 

 figured from a living specimen and not contracted due to preservation, 

 as in the specimens described by the other authors. Hessle, 1925 

 (A. gracilis) and Monro, 1933a (A. gorgonensis) indicated that their 

 respective species were close to A. rigida and A. albini. Hartman, 



